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BoredErica 07-19-2013 05:04 AM

Haswell Overclocking Thread

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Skylake Overclocking Guide

Skylake Overclocking Guide [With Statistics]

 
Welcome to the Haswell Overclocking Guide. In here I will do my best to provide information regarding Haswell overclocking. This is a guide driven by experiments, tests, and feedback accumulated from 15000+ replies.
 
This guide is no longer officially support by me. (But I'm still around.)
 
You are expected to read this guide before asking questions. At least ctrl+F the guide and try to find what you're looking for before posting please.
 
 
Basic Info (Click to show)

Why use this guide?

I get data from tests instead of taking claims from others on face value. I spend a long time testing each setting and charting the data to make sure my data is right. I have a long chart of OC results from OCN members with all of their settings noted. Average OC, etc, are derived from those values. I still update this guide and this guide is built and updated upon thousands upon thousands of replies.

 

What is overclocking?
 

Simply put, you up the performance of the CPU, typically by increasing its core clock speed. With 4670k/4770k we do so by upping the multiplier. So a x44 multiplier with 100 base clock is 44 x 100 or 4400 mhz or 4.4 ghz. Overclocking may potentially damage your cpu beyond repair. I am not responsible if your CPU dies. Just use common sense, watch the temperatures before you dash off to stress test for hours on end, read the entire guide before doing random changes, etc. There has been no confirmed Haswell CPU deaths I have seen due to sticking to my guide with my parameters for what is safe.

 
What is Haswell?
 
Haswell is the forth and latest-gen cpu line out for consumers. Of all the ones released the two of most interest are the 4670k and the 4770k (~$220, $330 respectively). These are the two unlocked versions of Intel's line of CPUs. This means we can adjust the core multiplier for overclocking later. It has IPC improvements over Ivy Bridge, meaning a 3.5ghz Haswell will typically beat a 3.5ghz Ivy Bridge. take that into consideration if you get a lower overclock. Its integrated graphics are of no concern for the PC enthusiast as you will end up buying a discrete graphics solution. Of course, the 4770k is an i7 with hyperthreading and the i5 does not have that. There is no shrink this time; the manufacturing process stays at 22nm. This is the tock in the tick tock model from Intel.
 
What about turbo?
The 4670k turbos to 3.6ghz if all cores are under use. This is the default 'overclock'. It goes higher if only a few cores are used.
 
What is this USB 3 error I heard?
 
There were some issues with sleep mode and USB 3 slots on some motherboards at the very start. The problem was caught and as far as I can tell, no consumers have been complaining about USB 3 issues and the vendors assure us that the issue has been fixed already.
 
What socket is this chip?
This chip is a socket 1150 chip. You will not be able to use the same motherboard from any generation ago. You will be able to use the same cooler if it worked with the 1155, however. This includes the popular Coolermaster Hyper 212 Evo, Noctua D14, etc.
 
Why the motherboard change?
This is due to power changes in the CPU. Some parts relating to CPU power control have been moved from the motherboard to the CPU. This allows for more advanced power states for the CPU. Mean note that while CPU power draw as a whole did not decrease at peak by that much, that some elements of the motherboard have been moved to the CPU causing the overall power consumption of the system to decrease as a whole.
 
What about chipsets?
The chipset of concern is the new z87 chipset. It allows for more 6gb Sata connections... for a total of 6. Up to 6 USB 3.0 ports will be available with native support. Typically you will find PCI 3.0 slots. Please note that a x8 PCIE 3.0 is equivalent to a x16 PCIE 2.0 slot. Ram is typically supported up to 3000mhz DDR3. In addition to all of these benefits, the onboard audio has been updated to the new ALC 1150 standard. Although the specifications are superior, please note it's the total integration of the technology that dictates the end sound quality.
 
Any info on batches?
There are the Malaysian batches and the Costa Rica batches. I've listed all the results from other people down in the graph later in this thread. I noticed no major difference between batches however I have not heard of a seriously bad Costa Rica chip yet. It may be due to the fact those are still rare. It's hard to figure out how well a CPU will overclock if you don't overclock it, but one very dodgy way of doing it is to check stock VID.
 
What about delidding?
Unfortunately, Haswell comes with problems of its own that would be fixed by a proper delidding. Please note that delidding may make your CPU harder to sell again and it may be dangerous if it goes wrong. The glue used to hold everything together left some room under the IHS or integrated heat spreader. You can use the razor blade method but I recommend the vice method as it is much safer. Please watch videos on it and ask around for more info before attempting. If you do something stupid, you've just broken your CPU. It doesn't happen all that often, but do be careful. I recommend going over to the delidding page for specifics but the very quick rundown is to clamp the CPU onto a vice, and hit it with a wooden block so the top metal part of the CPU pops off. Remove the gunk, add your choice of applicant... Coollaboratory is well regarded for this task. Thin layer. You can expect a good 10C decrease in temps, maybe more. Go to https://www.overclock.net/t/1313179/official-delidded-club for a nice guide on delidding.

My recommendation is to not go into Haswell with delidding as your first goal. Only delid if you are thermally limited and you feel being able to crank voltage up a bit and thus generating more heat is vital to getting the next multiplier. You may find out going to the next multiplier is unstable no matter what voltage. First thing to do is to drop to x264 stress test and see if the temps are OK there. Delidding only makes sense when your overclock is being severely impeded by temperature AND you have voltage headroom. Often, this thermal issue can be bypassed by using a less hot stress test. I got approximately the same temperatures from 1.2v @ Linpack vs 1.5v @ Chess. Also, delidding won't help if your voltage headroom is very small. Delidding is to decrease temperatures to allow for higher voltages. If you can't push higher voltages despite being cooler out of fear of degradation, then delidding is mostly pointless as well.
 
Is there any insurance for my CPU?
Intel has a protection plan you can buy with your CPU for $25. It is designed to cover CPU death due to overclocking. It is not designed to cover delid-deaths but one guy said he managed to exchange his dead Haswell for another one even though it was delidded. Bear in mind that may just be due to the one kind Intel service rep that day.
 

 

 

 
Overclocking Preparation (Click to show)

 

Is your heatsink/cooling solution up to par with what you wish to attempt? Expect hot temperatures ahead. Overclocking isn't horrible, but the heat will be biting. Anything under 80C is absolutely OK for 24/7 running even for the paranoid. 90C or higher is only acceptable during a stress test. Please avoid 100C, that is dangerous and the CPU will attempt to throttle. It's bad practice to have the CPU so hot, it throttles.
 
Stock -> Coolermaster Hyper 212 Evo -> Noctua D14/Thermalright Silver Arrow -> x60 Kraken -> Custom Loop
 
CStates
First, a little bit of a heads up on Cstates. Whereas normally my computer would hammer my CPU with 1.42v of juice, it will now sip, say, 0.3v doing daily activities that I do but scale up when more power is required. This is very good for the longevity of your CPU as well as for power savings. You need to adjust the option in your motherboard BIOS. Enable C states. The higher the C state, the deeper the power savings. I set it to C7. No, no performance penalty/stability has been noted with this setting. Some people reported their power delivery being higher than estimated on idle because their power options in Windows is set to performance, not balanced. It does not affect me personally. To check if Cstates are working, close all major programs. Open HWMonitor or HWInfo and check the Vcore, not the CPUVid. The Vcore should jump around and increase as load increases. (BTW: The "watt" reading from HWinfo is sketchy at best. It's not that useful and the accuracy is questionable.) Don't forget, some versions of CPUZ are really sketchy for measuring Vcore.

What about Adaptive? I'll talk about this later in the guide but right now I recommend setting voltage mode to Override. Gigabyte boards don't even have adaptive options.
 
Unsure about reading from your software?
Use HWinfo. Using HWinfo? Ask a question in this thread and check HWmonitor.
 
The Vcore reading on Hwinfo can be seen if you scroll down. It is *not* the VID reading. Most of the time people who say they can't find it simply didn't look in the right place but sometimes the sensor is simply missing. It may even go under another name but typically as a voltage reading that is close to the area where Vcore reading would be. If you have Cstates at 7, and a reading is jumping around and hits your set VID when under load, then that is your Vcore reading. What is VID and what is Vcore? I'll talk about it later.

 

 
NOTEONLY stress synthetics with adaptive OFF! It can force the motherboard to give the CPU more volts than you set it to under very heavy loads. This primarily happens with synthetic programs. Stressing with adaptive may overwhelm your cooling solution and cause sad things to happen. With override mode while running normal programs, you MAY still cause the CPU to get more voltage than you set it to, but the difference is down to say, 0.03v max. That isn't too bad but that is still significant, so be aware. The size of this small bump is basically the same from CPU to CPU. Some think this is due to a sensor inaccuracy. Either way, this small bump is normal.
 
Update your UEFI to its latest version! This is still a new launch and bugs and updates are expected! Update your stress test and your monitoring programs! Note: New stress tests might be more intensive.
 

 

 

Overclocking (Click to show)

 

First and foremost: Expect overclocking results to differ. We should all know by now that not every chip is created equal. With Haswell, this is more true than ever. I'm serious. Your motherboard isn't nearly as large of a factor as it used to be. It's almost all up to your luck with your CPU now. Expect a very wide variance in end results. It's a silicon lottery, folks.
 
  1. Set Uncore (AKA Ring Bus) to core ratio to manual. Set it to stock multiplier manually. With ring bus running on stock and locked at stock for now, no need to fiddle with ring bus voltage. That goes to auto. Some motherboards MAY increase Vring to unsafe levels if you didn't manually set ring bus to stock because the motherboard will try to auto-overclock the ring bus if left on auto. Avoid future headaches by following step 1. If you have a Gigabyte motherboard, set uncore to x33. Reason stated in the next bolded section.
  2. Set any XMP profile OFF for ram. If your ram is above 1600, set it to 1600, no higher while we're testing overclocks. Heck, if your ram is XMP'ed for 1600, lower it to non XMP. Doesn't hurt.
  3. Start ramping up the core multiplier and voltage until you think you've found your sweet spot. You might need to increase input voltage from the motherboard-set setting once you hit higher voltages. More on that later. Do stress test and if you pass, go to step 4. NOTE: Yes, you up the core multiplier by 1 each time. You can probably get away with starting at 4ghz though. Because the core clock is 100, 100 x 40 = 4000mhz or 4ghz. 
  4. Now we fiddle with ram, higher ring bus/ring bus voltage in effort to get marginally better performance. Stress test. Do not raise ring bus or ram if it means lowering core clock for stability.
  5. If you are hardcore or have a lot of time on your hands, you can try adding clockstrap to the mix but I'd stay away from it unless you're super duper picky. Nobody has reported very good results with this but you're welcome to experiment.
  6. Set Cstates to ON to C7. If you really care about lowering idle voltage, hit ctrl+f and search for "Power Saving Info".
  7. Have a glass of iced tea. :applaud:
 
Override voltage mode the same thing as manual voltage mode. For stress testing neither uncore nor core should be at adaptive mode.
 
If you simply raise the multiplier on the core and change the voltage, you'll probably run into a bad overclock because the overclocked ring bus will hinder the core overclock. And they say it but it's true: Core is king. cheers.gif You'd generally rather have stock ring bus if that means getting 100mhz faster core clock. Same for ram of course... it's a tall order to hit DDR3 3000 with higher overclocks.
 
I've posted benchmarks under this section somewhere, which shows graphs proving ring bus settings to be of little consequence in benchmarks and applications. Keep in mind if you are adamant in overclocking the ring bus you also need to provide extra voltage to it. Your core clock should always be equal to or higher than your ring bus.
 
If you are using a high Vcore for your overclock, typically for the higher multipliers, input voltage may also be important. I'm talking about 1.30v and up. Info listed later in the guide.
 
Gigabyte Motherboards
Gigabyte motherboards have been noted to automatically ramp up uncore to x40 when you manually set it to stock. So just set it to x33. You can also set it to x34 if you have a 4770k, or x35 if you have a 4670k, it doesn't matter. (Yes, stock core and uncore frequencies are both 3.4 for 4670k, 3.5ghz for 4770k.
 
Asus Motherboards
If you have an Asus motherboard, there has been some chatter about bios versions. Some people say that version 804 of the bios is best for overclocking. The point is, different versions of the bios may positively or negatively affect your max OC. Please note that none of this has been personally tested by me because I do not own an Asus motherboard.
 
OCing Common Sense
You up the vcore slowly. You don't go from 1.1 to 1.2 to 1.3 to 1.4v just like that. Maybe you can start at 1.2, 1.25v but that really varies on the stress testing method. The problem with going straight to a higher voltage is, you may overvolt and use a setting that is less than optimal for stability (not proven) or temperature (obviously proven). Say you start OCing by going to x45 and using a whopping 1.45v straight up and it works. If you don't back down that voltage and you leave all that unnessary voltage about, you will not only cause more heat than you need to, you will decrease the longevity of the CPU for no good reason. At minimum I suggest going from 1.2 to 1.25 to 1.3 to 1.35 to 1.4. Any larger jump I think is completely useless for attaining a good, fine voltage.
 
When you plug in a higher voltage for the first time or use a stress test for a first time, eyeball the temperatures. You can go from 70C in x264 to 100C in Linpack quite easily and if you run off to make a sandwich, you risk hurting the CPU when you could've watched the temps for the first 10 seconds of the stress test and avoid this.

If x44 is stable, don't jump to x46, and then say it's not stable. And for the love of god, don't waste your time telling us x47 or x48 is unstable.
 
One Variable at a Time!
In a scientific study, you have a control group and an experimental group. Basically, you see the effect a change in a variable has on something. You do not change 50 things and then draw a conclusion that all 50 things contributed or caused the result. You change one variable at a time. If I overclock core and uncore at the same time and I crash, how will I know which caused the crash? I won't. There's nothing wrong with overclocking the uncore, but it's secondary because the performance change is less than a core overclock. That makes the core overclock the most important. So do the core overclock first until it's stable. That way, if you ever crash after overclocking uncore, you know for sure it's the uncore settings causing instability. This is yet another reason to follow this guide in this order.
 
"1:1 Cache Ratio"
In a perfect world we'd all be running 1:1 cache ratio, but we'd also be running 500 ghz overclocks and sipping iced tea on clouds. We don't live in that world. If you got a cherry picked unit, fine, you can hit 1:1. For the rest of us, you cannot, pure and simple. Say the highest core overclock you can get is 4.6ghz. If you try to bring your uncore also to 4.6ghz, very likely you've either 1) Crashed your system because the uncore OC makes the core OC unstable 2) Crashed because you lack sufficient Vring 3) Applied unsafe Vring. You can't get past the first issue. You'd rather have 4.6ghz core and stock uncore (3.4ghz is stock core and uncore for 4670k, 3.5ghz for 4770k) than 4.5 core and 4.5 uncore. So what the heck is this 1:1 Cache Ratio nonsense?
 
It's the idea that your ring bus helps your performance up until it is the same speed as your processor. But you should know by now that ring bus helps performance... by a super small margin. The amount is negligible. It's basically saying, if your ring bus is higher than your core speed, that extra ring bus isn't doing anything supposidly. But the entire point is useless as pretty much nobody can hit 1:1 in the first place, let alone get above 1:1. Let me make this crystal clear: 1:1 doesn't make your CPU magically faster. You don't get an extra boost for doing 1:1. It's the same boost from 1:0.9 to 1:0.95 as 1:0.95 to 1:1. The amount of performance gain from uncore is roughly the same no matter how close your uncore is to your core. All that jabber about "keeping uncore 200-300mhz below core" is simply misleading. There is no such bottleneck that occurs if it's lower which those people seem to imply, and I have hardcore benchmark after benchmark to back up my statement. You overclock core with uncore set to stock so it doesn't lower your max core overclock. Then you overclock uncore without ever lowering core to get a higher uncore. If it happens to be 200-300 mhz under your core, awesome. If not or you don't want to push an unsafe Vring, that's fine too. Overclocking Haswell is complicated as is, last thing we need is to mislead and confuse people with 1:1 ratios.
 
Voltage Parameters:
You will pretty much always be fine at 1.2v for core voltage provided you're not stressing on synthetics. Synthetics are things like Linpack, Prime95, Aida64. They are just that, synthetic tests, as are not actual real-world loads. Non-synthetic stress tests would be like chess or encoding a video with CPU only.
 
If you do want to stress I recommend Noctua D14 as a starting cooler. What happens if you have a 212 Evo from Coolermaster and you want better cooling? You now are stuck with a lower-end cooler.
 
At 1.35v or higher, x264 is the recommended stress testing method. Some question the validity of an overnight x264 loop for stability but so far no evidence has shown it is insufficient. Otherwise only high end closed loop or a custom loop should play at this setting. Haswell temperatures are very reliant on voltages, not frequency. Note that while I said, for example, that 1.35v requires a high end closed loop solution or better for Linpack stressing, that does not mean that's required for gaming/any other non-synthetic application. Only you can decide what sort of stability is acceptable to you. There is a chart of stress tests and the temperature it creates at a given setting later on for easy reference.
 
If you do a multiplier assuming it's stable and later get a Bsod or Bsod after later moving on to a higher multiplier, you might be tempted to blame the CPU or degradation when in fact it was your own insufficient testing in the first place.
 
Now why exactly did I list my recommendations about voltages this way? What matters in the end are two things when it comes to voltage safety: A) You do not hit above 95C under whatever you wish to stress and B) You do not exceed 1.45-1.5v no matter what. The thing is, most people run into the first problem long before they hit the second, because by 1.35v if you want to run Linpack, you're already getting dangerous temperatures on air. If you are using a custom loop with a delid though, the second problem might hit you first. Personally I am running 1.42v at 4.6ghz on D14 and the only reason why I can do so is because I'm not stressing with Prime or Linpack. However if my settings are stable then I can squeeze in that extra 100mhz because the max real-world loads will not anywhere near Linpack. But let me repeat this implied point: Simply saying "this voltage is too much" is typically insufficient. This voltage is too much doing this stress test with this cooling solution at these ambients.
 
Quick note on auto-overclocking: It will not be as efficient as manual. Do it manually. I wrote a guide. Use it. If you have MSI motherboard, OCGene will block manual overclocking. You need to click on the OCGenie button in the BIOS to stop that from happening. Lower end MSI boards may be voltage locked above a set amount, say 1.3v! Beware!
 
About Ring Bus aka Uncore aka Cache Ratio Tweaking:
The naming used differs between motherboard manufacturers. Keep in mind that Uncore is the same as Ring Bus, and is sometimes known as 'cache ratio'. Some boards have 'minimum' and 'maximum' cache ratio. Just set them to the same. Obviously, 'cache voltage' is 'ring bus voltage' or 'uncore voltage'. I would recommend that you stay under 1.3v for uncore voltage. Ring bus takes less voltage, don't just replicate it as if it were core clock. You are going to need to raise ring bus voltage if you plan on overclocking the ring bus significantly. If your ring bus is manually set to the default value, meaning it's not overclocked for sure, leave it at auto is typically fine, but you can set the uncore to 34 or 35 (doesn't matter) manually and then set uncore voltage to 1.2 so there is no way the motherboard can accidently overclock your uncore or use a super low uncore voltage by default. Try not to exceed 1.35v. I try to keep it at 1.3v or under personally. If you do not set ring bus to stock multiplier manually, some motherboards will try to overclock it on its own, which might not only crash your system, it could also damage your CPU because the dumb motherboard is setting an unsafe voltage!
 
Is 1.3v+ safe? Nobody knows and nobody needs to know. Uncore affects performance so little, and as you increase multipliers, the extra amount of voltage required for that extra multiplier increases over and over. If you're hardcore enough to care about the small difference you might be able to net in 1.3v+ uncore voltage, breaking a CPU or two won't matter.
 
Input Voltage (aka VCCIN, Vrin, Eventual Input Voltage)
The VRIN can be thought of as the entire amount of voltage drawn by the CPU and all of its components. 
 
When your Vcore is really going up, at least 1.30 probably 1.35v or above, you may need to change other settings. For one, keep your Vccin or total CPU voltage to 0.5v above Vcore. You can try 1.9 or 2.0v. 2.2 is uncharted territory, but for my personal overclock, a Vcore of 1.42 required Vccin of 2.15v for stability. Vccin is also known as Vrin. In Asus ROG boards, try tweaking the "eventual input voltage" instead. No benefits have been recorded by tweaking the "initial input voltage" setting.

I recommend changing input voltage in 0.05v increments. Any less you need a zen-like patience to test everything. I recommend max 0.1v increment if you are lazy. Do not do the same with Vcore or other types of voltages obviously. The reason why input voltage becomes a larger factor at higher Vcore is because input voltage is typically automatically managed by the motherboard's own software. But when the Vcore goes high up, the motherboard almost never compensates the input voltage well enough to ensure stability. Depending on how good your motherboard is at making sure the CPU has enough input voltage for the Vcore, you may have to tweak the input voltage before you even hit 1.3v Vcore.
 
For my case, I was trying to get x46 core multiplier and could not stabilize. Odd, considering x45 was rock solid @ 1.35v. I scaled up voltage from 1.35 to 1.4, 1.42, 1.47, 1.5, 1.512v, without being any more stable as voltage went up. The key was a higher Vcore, AND a higher input voltage. I demonstrated this by testing stability at 1.42v with various input voltage. I tested by running x264 until Bsod 5 times per setting, keeping track of averages. From 1.85 to 1.95 to 2.05 to 2.15, I could see demonstrable improvement in stability, with a higher maximum, minimum, and average time until Bsod. So what is this saying? Often times we are just tempted to test the Vcore and if it doesn't work, just get a higher Vcore, and higher, until we use ridiculous voltage and still crash, where we then put our hands in the air and give up. Just chucking Vcore as high as you can will often not net stability if you do not have high enough input voltage to match that high Vcore.
 
Also keep in mind that the amount of Vrin you need for a specific Vcore varies from CPU to CPU.
 
LLC (Load Line Calibration):
For Haswell, this is a setting for Vrin, NOT Vcore. 

Please note I can only test LLC for MSI G45 Gaming Board. For this mobo, the setting is under the "DigitAll Power" section. Also note that LLC is for Vrin, NOT Vcore, Load tested with Prime95 28.3 with HWinfo. The Vrin as set by BIOS is 2.15v.

12% LLC: 

IDLE: 2.176v

LOAD: 2.112v

 

100% LLC:
IDLE: 2.176v

LOAD: 2.16v

 

This means that upping that LLC can potentially help you when your Vrin is the offender.

 
 
Io/Sa Voltages
Also, you may need to alter the voltages for SA, IO Analog, IO digital as well. Try adding 0.1v to them.Please note: It is unclear at this point what voltages are dangerous. Be careful with these voltages. JJ from Asus said these voltages help stabilize a higher Dram divider but I got 9c errors at as low as 1600 DDR3 while managing a stable 2133 OC without touching these.
 
CPU VID vs Vcore
There is a difference between CPU VID and CPU Vcore when I mention both of them together. I repeat: Only when I am talking about VID and Vcore in the same sentence does my definition of Vcore change.
 
Normally when I say Vcore I mean what you think I mean. But when I mention VID vs Vcore, VID is the amount of core voltage you set in the BIOS yourself. You should know it, you're the one that set the voltage in there. The Vcore is the number measured by Hwinfo or HWmonitor on your CPU when it is under max load.

What does this mean? Your Vcore could be above your VID. If you set 1.3v in the BIOS that's 1.3v VID. If you are also under adaptive voltage and you're running Prime95, your Vcore could be a whopping 1.5v, way above your set 1.3v. 
 
Finally please note, there are multiple reports of people having a higher Vcore than VID even under non-synthetic loads but the extra voltage is relatively small. Just be careful and monitor voltages closely. As your VID increases the extra voltage drawn in from a regular non-synthetic load increases.
 
 
Bsod Codes
When you Bsod, it shows a code outlining what happened. However, with Haswell I've noticed that the code itself isn't a perfect tool to diagnosing what exactly is wrong with your OC, just that something is actually wrong with your OC and it's CPU related. The codes are 101, 124, 9c. When you get those, you know your CPU OC isn't perfectly stable. If you're getting some oddball code like 116, 3B, etc, then something else is causing the computer to crash. Yes, you can make Bsod screens stay up until you manually restart. A google search should net the answer. In Windows 7 at least, after a Bsod, Windows shows what the Bsod code was. Windows 8 also has Bsod "codes", like Error Time Watchdog, etc. You can check your Bsod code sometimes even though you didn't actually see the blue screen. Sometimes on Windows 7, upon starting up the computer again, it'll say 'last time something happened' and show you the Bsod code in the description. You can also try Bluescreen Viewer.
 
How do you know what voltages are "safe"?
Everything is off of past experience and estimations. Nobody can tell you for sure because to do that we need to destroy multiple CPUs to tell. Degradation also needs to be checked and that would take a year at least of testing and multiple CPUs set at various different voltage settings. In other words, real testing is impossible.
 
Power Saving Info
The sad part about Haswell is that motherboard vendors do whatever they want. Uncore can be called ring bus or cache ratio or whatever. It's similar with power saving but worse. For MSI G45 Gaming motherboard, adaptive is ABSOLUTELY USELESS as a setting. It does absolutely nothing for voltage under load or on idle. All it does is give you the risk of borking your CPU if you run it with Prime. I've testing this through and through on this motherboard because the result was so counter-intuitive. For MSI G45 mobos, to get power saving you need to have C states set to 7 for maximum power saving on idle. If you want multiplier drop on idle, you need to enable EIST in the BIOS. Having C7 and adaptive vs C7 and override/manual voltage mode made zero difference in idle voltage. There are conflicting reports for other motherboards on what is required for voltage drop on idle. I do not have the money to buy multiple motherboards and do a battery of tests of each motherboard. So I just say, figure it out yourself. The relevant settings are adaptive vs manual voltage, C states, and EIST. No identifiable temperature drop or performance drop was noted by using Cstates or EIST from my tests. If you have a Gigabyte motherboard, adaptive isn't required for voltage drop because... well, you don't have that option to begin with. Just Cstates for you.
 
A little bit more on EIST: Dropping multipliers on idle has no measurable difference on idle power draw. It does not increase the lifespan of your CPU because clock speed doesn't kill CPUs, voltage does. Clock speed doesn't draw more power, voltage does. Lower clock speed on idle is irrelevant for temperatures as even 1.5v Vcore on idle is dead cool. For MSI G45, the EIST option is "multiplier mode", which must be set to variable instead of fixed. In Windows, your power settings must be set to balanced. You need to restart for the settings to take effect, and once you boot into desktop you must wait a minute or two for the settings to kick in and the multiplier to drop on idle. I literally mean a minute or two, as in 60-120 seconds.

 

 
Ring Bus Doesn't Matter [Evidence] (Click to show)

 

Credits to Maxforces for the second part of the benchmarks. From my personal benchmarks, I found the drop of 0.7ghz for the ring bus to be an equal performance hit of 0.05ghz decrease in core clock and this difference shows in a very CPU reliant benchmark like chess.

 

 

And here are the most recent tests for uncore that I have done:

The 4.2 vs 3.4 is the uncore setting. The core multiplier for this test was x45.

 

Testing methodoloy in this test is much more well documented by me.

Chess: Houdini 3, 9mb hash, starting position, 5 minutes.

BF3 Multiplayer: 64 player server in a closed map (Canals). Regular gameplay for entire round.

BF3 Campaign: Second misson, following scripted NPC movement.

Enemy Territory: 30 vs 30, Fueldump.

Runescape: GE, World 3. Capturing FPS while stationary. Max detail, non HTML5. x4 AA Bloom enabled. (It seems to use CPU to do AA)

Oblivion 1: Walk out in the wild, through Oblivion gate, to town gate.

Oblivion 2: NPC combat in Imperial City. Several guards/NPC vs Umbra. Spawn 50 player copies and begin combat once Umbra dies.

 

These were done on tests, as you can see, that vary from CPU benchmarks to CPU reliant games.

 
Maxforces Says:
Test setup

 

Results

 

 

 

 

 

 

 

 

 

 
but if you play 3dmark you will gain some pionts

 

 

 
 
 

 

 

 
Stressing (Click to show)

 

NOTE: Do not stress on adaptive!
 
Why are my temps so high? What's up with different core temps?
  1. Which test are you running on what setting? Double check with the chart down below. For example, Aida64 full suite is NOT the same as Aida64 FPU test only. IBT is hotter than Prime 27.9 but not hotter than Prime 28.3 on small. Prime 27.9 is cooler than Prime 28.3.
  2. Ensure you are not getting Vcore spikes due to adaptive voltage while stressing on synthetics.
  3. If your temp from one core is 10C+ hotter or cooler than some other core in a load that loads all CPU to 100%, it might be a thermal paste application error. Pea method, folks. 10C degree difference and lower is NORMAL on stress tests.
  4. Does your cooler just suck? Are you trying to apply Sandy Bridge voltages onto Haswell?
  5. It is hypothesized that some temperature variance between CPUs is normal because the way the gunk inside the CPU under the IHS is applied is spotty, better in some and worse than others. While this is NOT backed up by actual scientific testing, it makes sense and accounts for the temperature variance.
  6. Hyperthreading makes the CPU hotter. This means 4770k might run hotter than 4670k.
 
'I must pass all stress tests!'
This kind of thinking might had merit in previous generation CPUs, but in Haswell at least, it is a load of bollocks. As you can see from my chart below, the range of temperatures vary wildy from test to test. We are talking about a 45C difference in temperatures. If I had stuck to Linpack or go home, I would be down from 4.6ghz to 4.1ghz. (This is backed up by testing.) This is insane. Linpack is so ridiculously hot, so completely out there, it's not worth counting. The mentality of passing all tests for the sake of stability is more irrational than you might presume at first glance. That kind of mentality means passing whatever test people happen to be able to make. If nobody made Linpack, then you would think your CPU is stable. If somebody made Linpack 2.0 that makes Linpack 1.0 look like child's play, then you might as well never overclock, because Linpack is throttling a few people at STOCK. Indeed, Linpack uses AVX2 which is a new instruction set, but so does x264, and that is one of the coldest benchmarks. Stressing AVX2 set doesn't nessesarily mean high temps and failing Linpack doesn't mean AVX2 instability. And how will you know when to stop stress testing under the original ideology? You can only estimate. Computers are built for using, not for stress testing. If you're running Linpack, and you're under the opinion that you must pass all possible tests, you need to update the math logic for Linpack and run it at MAX setting. That means using up all of your available ram for the largest problem size.
 
Run 2-3 different types of stressing programs, and then use your computer normally. If you crash, then it's not stable. What's stable for you might not be stable enough for me. Some people need 100% reliability because of their jobs. Some people can handle a Bsod once a week. NO, saying that you want to pass Linpack 'just in case you use your CPU to extreme limits' is complete hooey. Prime95 is already ridiculous. Linpack is ridiculous on top of ridiculous on top of unicorn blood powered by the core of the sun, worshipped by space aliens. What if there comes out a new normal application that uses as much CPU power as Linpack? Well, there is no hint of that happening, so this is just a 'what if'. Well, what if there comes out a new application that throttles you at stock? Then let's all downclock our CPUs! If you insist on passing every test just because, fine, just don't expect any half-decent overclock. If I hit 95C+ easily at 1.2v with D14, there is no way anybody can hit 1.25v+ with Linpack set to max even after delid and x60 Kraken. And guess what, the average voltage setting for the OC results chart is 1.3v, so what does this tell you? You'll be lucky to stay on 1.25v after delid and liquid cooling and having a stable setting because between Prime 28.3, which discovers stability issues like a god and Linpack at max which raises temps like a god, you will be severely hampered by the combination of both tests.
 
Don't give me that 'If you crash on anything, you're unstable, period' crap. Anything is decided by whatever program people decided to make. And if your definition of the word stable means not crashing in anything, ever, then I don't care about what you call stability. You will never know if something is stable by your own criteria because if you pass Prime for 500 hours, what's to say the 501th hour will be stable? That's right, you stop at some arbitrary time. I care about the computer not crashing often enough to annoy me. And that could be once a week, once a month, once a year, never, every 5 seconds. But as long as I'm fine with it, that's all that matters because it's MY CPU.
 
If you're ever Bsoding 'too much', all you have to do, if you are in the heat of the moment, is to lower the multiplier by one and BOOM, rock solid stability.
---

 

While I was testing, the only stress test that Bsoded me was beta Prime.
 
Refer to the temperature chart! Different versions of the same test will have different temperatures. Most notably is Linpack (some versions don't have AVX2) and Prime (28.3 is considered hotter). Also note in Aida that the setting you pick changes your resulting temperature. XTU Bench is hotter than XTU Stress. XTU Bench temperature increases as ram speed increases. Expect up to a 10% temperature variance. Don't forget, the settings I ran for the chart is listed in the Excel picture just above.
 
You will not hit those temperatures under normal operation. If you hit 95C you might be fine outside of stress testing. It's very unlikely your games will seriously stress your CPU across multiple cores. The temperatures of x264 and chess tell you what temps you will see as a worst case scenario realistically.
 
x264: The Cool Stresser
I highly recommend trying x264 encoding test if you are looking for a stressful nonsynthetic stress test. Nonsynthetic meaning temps will not be very high, being only a notch higher than normal 100% CPU load. Voltage will not increase dramatically like in Prime95 if you are using adaptive. But it'll still be very stressful, often causing crashes in an hour at most. For a peace of mind I recommend running x264 looped all night as you sleep once, and if it passes, it's stable. We have managed to produce a x264 version modified for stressing purposes instead of benchmarking purposes.
 
Angelotti made a nice post with his tweaked and optimized version of x264. It is a little more stressful than standard x264 and has a few small improvements over the original x264. (This version has the Loop.exe built into the application itself; no fiddling with different exes.) This is the recommended version of x264 to use by default.
 
Version 2.06
9/15/2015
 
 
For those who want the original x264 for some reason, below is a link. It also includes an early version of the loop functionality.
 
 
x264 is the recommended and the default go-to stress test for this thread. If you feel the need to use a hotter test that is your right but know that your overclock may be hampered by that choice. You could forego delidding in many cases simply by switching to x264. The default prescription for a stable CPU is a pass of overnight x264. Overnight means you set it to run when you start sleeping and if you wake up to a stable computer, you're good to go. That's a good idea because then x264 will not lag your computer while you're using it and you can easily go 8-12 hours without using the computer as you're asleep during that time.
 
Chess: The Easy Stresser
One test easier to pass is chess. I recommend using Arena GUI and Stockfish engine. Both are free. This is the easiest test to pass out of all of my suggestions.
 
Prime95:
For some people, being unstable causes Prime95 to stop. This can come in the form of Prime95 outright crashing and closing entirely, or having a core or three simply stop working with an error noted. This means your overclock failed the test.
 
Prime Beta (version 28.5): ftp://mersenne.org/gimps/p95v285.win64.zip
 
Software Monitoring:
We recommend using HWinfo. HWInfo is the best if you want all the info in one place and you want tons of info. To measure and check your C-state settings you can only use HWMonitor or HWInfo. For me, the VCore is under my motherboard section, which may be confusing. It should be changing a lot. You need to use the latest version of the software! First check to see you have the latest version! The guide assumes you use HWinfo.
 
I do not recommend using CPUZ. It has always been sketchy with the Vcore reading but some people are saying some versions are fixed. I'd rather use HWinfo and get all of my temps, voltages, etc in one place with VID and Vcore and Uncore all shown without glitches.
 
Can't find VCCIN/Vrin on HWinfo? On Asus motherboards, try looking for VCOREREFIN.
 

 

Battlefield 3:

This game is known for being easily unstable under an overclock. Some people consider this a better test of stability than even Linpack! For Battlefield 4, be careful because crashes may be due to immature drivers for GPU or software issues!

 

Battlefield 4:

...Is currently still unstable as a game. So in terms of stability testing, it's of limited use. But if you BSod, well, that's still probably CPU overclock, not a crashy game. If the game just crashes, blame the game.

 

'Prime95 is not Certified for Haswell'

Right, another unsubstantiated rumor floating around. No software is ever certified with a CPU. There isn't a committee that goes around with official badges handing out official certification after a 10 step process, ok? There have been zero proven reports of CPU death due to Prime95. You can say, better safe than sorry, in which I reply with, don't even overclock then! Nothing is absolute, but the data has come in and it shows the scare being unsubstantiated. Look at the chart, there are piles of people who stress with Prime95. Half of the misconceptions stirred from a claim that Prime raised voltages way above what is normal. YES, if you run it on adaptive. But the same thing happens for every other synthetic, Prime isn't special in any way. It just so happens that Prime is often the first stress test people run, and if they don't know about adaptive stressing, they will freak out at the voltages before they know the full picture.

 

Input Voltage and Uncore increasing temps: The Verdict

No significant or easily measurable increase in temps were present. The temperatures were within margin of error. Tested with Prime95 28.3 with HWinfo.

 

Test settings:
Default Setting:
43/34

1.25/1.18

1.9v Vrin

 

Testing Uncore increase in temps:

43/31

1.25/1.28

1.9v Vrin

 

Testing Uncore + Input Voltage:
43/34

1.25/1.28

2.15v

 

Extra Note:

Haswell is still a new launch. That means programs associated with it will constantly get updates. Older versions of Prime are easier to pass than newer ones. Many programs have glitches. There are idiosyncrasies. The only way to iron out what's what is with your cooperation, and lots of communication.

 

ProTips:

If you want to find out when your computer Bsoded for whatever reason, you can look at Windows/Minidump. It is time stamped.

 

You can find out how stable your setting is by running a stress test and seeing how long it takes to crash. I tested what VCCIN is optimal by running x264 runs, 1.85, 1.95, 2.05v, 2.15v VCCIN and I recorded how long it took to crash after five tests. This is how I figured out I needed 2.15v VCCIN.

Still Stuck? Read this! (Click to show)

Troubleshooting Guide:

  1. Did you read the entire guide? No, seriously. Did you?
  2. Did you ask a question in this thread? Listing more info than is needed is typically better than listing too little. What is your Core and uncore multiplier, their respective voltages, input voltage, ram speed and timings, CPU, base block, and used stress test? What is your Bsod code if you have one? It crashed? How did it crash? What temperatures were you getting?
  3. Did you remember that higher Vcore means a higher Vrin is required to maintain stability?
  4. Did you set uncore to stock? Is the voltage for that uncore ridiculously low?
  5. Did you overclock your ram or GPU?
  6. Did you try to run Prime95 for 1,000,000 hours?

 

The Haswell Terminology Listing


Possible Haswell CPU models: 

4670k (without Hyperthreading), 4770k (with Hyperthreading).

 

Base Clock: Typically 100. Multiplied with the core multiplier to get core speed or with the uncore multiplier to get uncore speed, etc. Screwing with this can screw with multiple components.


Core Multiplier: The primary speed setting you change to change the CPU speed. x34 or x35 is typically the default. 100 base clock x 34 = 3400 mhz or 3.4 ghz.

 

Core Voltage: The voltage for core. Higher multipliers require higher core. aka Vcore.

 

Uncore Multiplier: The secondary speed setting. Always of secondary important to the core multiplier. AKA Cache Ratio or Ring Bus.

 

Uncore Voltage: The voltage for uncore. AKA Vring or Cache Voltage.

 

Input Voltage: The all-around voltage sucked in by the CPU for all the components. The higher the Vcore, the higher this should be. AKA Vrin, VCCIN, Eventual Input Voltage.

Last Ditch Effort to Find Stability:

This is typically best attempted when you are trying to hit that last multiplier and you're unsure what the instability is from. Run x264 multiple times (I did 5). Each time the computer Bsods, that count as 1 run. Time how long it takes to Bsod. Then change one setting. Note any change in average time until Bsod. This is how you figure out whether a setting is increasing, decreasing, or not affecting stability without relying on personal feelings but hard data. Specifically, this will tell you if you need higher Vrin or Vcore or both.

The reason why this test is effective is because it pinpoints the effect of a setting. Does increasing Vcore change stability? Yes or no? It can tell you the answer without you having the pass all of the runs. Just having a noticeable increase in average time until bsod demonstrates an increase in stability. Or maybe it's input voltage that's problematic. You can test that too. Just change the input voltage and see if the stability changes. For this test I would change input voltage in 0.1v increments.

To open up the Google Docs with all the info below, simply click on this link:

Can't see the chart? Log out and back into Google Docs!

 

 

Want to be in the chart above? Click this spoiler!

 
Having Your Overclocking Result Charted (Click to show)

In order to be charted you need to fill out this form:

 
Username:
CPU Model:
Core Multiplier: [If you used Blck strap, put what Blck and mention your resulting frequency]
CPU VID: This is the CPU core voltage value you input into BIOS.
Vcore: This is the CPU Vcore reading from Hwinfo or HWMonitor under load. "Load" depends on what you're stressing.
Uncore Multiplier:
Uncore Voltage:
Input Voltage: [aka VCCIN, Vrin, Eventual Input Voltage]
Cooling Solution: [If you are delidded, note it here.]
Stability Test: [Any test is OK, synthetic or not. IF YOU DO NOT LIST HOW LONG THE TEST IS RUN YOU WILL MAKE ME CRY.]
Batch Number: [Malay or Costa Rica chip? Please list the entire batch number if you can.]
Ram Speed: [Timings if you know them.]
Ram Voltage: [If stock, ignore this.]
Motherboard: [Optional. Not required to be charted, not required for picture verification.]
LLC Setting: [If you didn't change default, say AUTO]
 
Extra notes: If you ran a synthetic stress test like Prime or Linpack on adaptive and your Vcore is very different from your VID, I will ignore your Vcore because the number is useless. A Vcore under stress with override/manual voltage mode is useful, but with adaptive the voltage is totally blown up. Also, if you state that your uncore multiplier is "auto", I will write "34" instead.
 
Please try to be honest about what stability your CPU has. If the CPU Bsods later please come back and make a followup post. I'm spending a lot of my own time to maintain this chart and write this guide to help others and if you can submit your results and keep them validated and current, it will help me and other people a lot.
 
For the final picture verification column, you need to show a working picture to have it show "YES", otherwise it will be blank. The picture must contain the stress test, proof that the test was run as long as you claimed, AND it must also show HWmonitor or HWInfo's vcore reading. No, only VID will not cut it. Vcore. To be clear, I'm looking for the sensors part of Hwinfo, not the hardware overview which shows CPU and GPU logos. You do NOT need picture verification to be listed in the chart above, you only need it for the "YES" in the picture verification column.

 

AVERAGE OC 45.39 MEDIAN OC 45.00
AVERAGE VID 1.29 MEDIAN VID 1.28

Amount of overclock submissions: 181

===

Problems? Ask here! Do not spend 5 minutes, tweak 2 things, get a bad overclock, and rage!
Comments? I'd love to hear it!
Questions? That's what this thread is here for!
Suggestions? Go for it!
Share it if you like it!
cheers.gif devil.gif thumb.gif biggrin.gif
 
Guide Last Updated: 5/31/14
Please submit overclocking results to this thread! Changed your old overclocking settings? Post again to revise your entry!
 
 
To-Do List and Change Log (Click to show)
To Do List:
-Clean up mobo names in chart
-Needs another overhauil to simplify the guide.
-Add info about core temp variance from core to core.
-Add into on 1344
 

Change Log:

x/x/2014

-Chart now shows last update time at upper left hand corner.

-Added new VCCIN column in the chart.

-Vdimm values now moved into the ram speed column, now renamed 'ram settings'.

-Charting form now includes a pointer to note if delidded under 'cooling solution'.

-Chart columns have lower width to help those with smaller monitors read it more effectively.

-Now specifically noted what the x264 OCN link leads to.

-Removed an old portion of the guide with wrong info.

-Removed old, irrelevant info on x264 that now only confuses people.

-Now includes Prime95 download links.

-Fixed typos.

 

4/6/2014

-Charting form now includes me asking whether CPU is Malay or Costa chip.

-Input voltage section has some revisions.

-Edited delidding info.

-Removed the line repeated where I said, set xmp off even if it's 1600.

-Added info on Prime95 stopping while stressing.

-Added 'ram voltage' column to charting form.

-x264 download now includeds AVsynth and batch file in one download

-x264 loop exe updated.

-Override = Manual voltage noted.

-Chart average voltage values now rounds to 3rd decimal place.

-Added info about Gigabyte's ridiculous uncore ramping to x40 when set to stock.

-Added more in-depth info on power states.

-Added a quick note on Asus bios version.

-Ring bus benchmark spoiler title changed to "Ring Bus Doesn't Matter [Evidence]

 

1/16/2014

-Greatly revised the old chart of stress test info and temps.

-Added info on Cstates vs Adaptive mode. Any suggestion for using adaptive has been deleted.

-Vrin/Uncore and its effects on temperature have been listed.

-LLC investigation done and a new section included.

-Removed extra unneeded data from Stress Testing section.

-Revised total number of OC submissions.

-Better numbered list implementation.

-CPU voltage parameters cleaned up.

-Input Voltage info listed twice, now fixed.

-Added 'Why use this guide" part.

-Added some new titled at the stress testing section for easier reading.

-Last updated changed to guide last updated.

-Included picture showing where Vcore reading is on Hwinfo.

-Enlarged font at start saying not to stress on adaptive.
-Started a change log.

-Charting form now includes question for LLC.

-Added point to check another settings for Asus mobos if looking for input voltage reading from HWinfo, courtesy of Veerk.

-Fixed typo(s).

 

1/7/2014

-Moved the input voltage info into its own seperate section and moved it up physically. That way more people will read it as it is more important than some other settings. Also clarified Input voltage info.

-Added the 'Why are my temps so high?' troubleshooting tips under 'Stressing' section. Added tidbits on why a core is cooler than some other cores by up to 10C.

-Added this new 'changes from last edit' section.

-Revised total number of OC submissions, from 110 to 115.

-Included extra note to use HWinfo is readings seem off.

-Fixed typo(s).


BakerMan1971 07-19-2013 05:21 AM

had a quick read through, didn't spot anything about LLC (Load Line Calibration)
is the Ring Voltage you refer to what ASUS calls CPU Input Voltage? because that has turned out to be important too.

Great start to a thread by the way
My OC is 4670K with a multiplier of 42, 44 is on its way though, just need to tweak to perfection smile.gif

p.s. information on the different naming conventions between motherboard manufacturers should be on here imho smile.gif

BoredErica 07-19-2013 05:39 AM

Hmm Asus mobos call it 'cache ratio' for ring bus. I don't see where they call it CPU Input Voltage. Video I am referring to is here:
http://www.youtube.com/watch?v=ub6WnHmiIOs


I
'm going to try to grab mobo terminology from other vendors. The more data I can get from others the better, right?

I'll add something on LLC but what I heard is it's not really important anymore due to vdroop almost being gone.


BakerMan1971 07-19-2013 08:26 AM

Hey Darkwizzie

CPU Input Voltage
link to my bios screenshot

this is the voltage people are putting up as far as 2V maximum in range is 2.7v, AUTO sets it at around 1.8 for mine

to flesh out my entry in your sheet
its a 4670K with multi at 42 vcore at 1.22 LLC at level 5 everything else auto Cooler BEQuiet Dark Rock Advanced C2

Forceman 07-19-2013 12:16 PM

CPU Input Voltage on Asus is VRIN on Gigabyte
Cache Voltage on Asus is Vring on Gigabyte.

Not sure about the others. And LLC only affects the voltage going into the CPU (the CPU Input Votlage/VRIN) not the actual Vcore, so it is less important than it used to be.

The Real Deal 07-19-2013 12:28 PM

Post to follow thumb.gif

BakerMan1971 07-19-2013 01:26 PM

Hi Forceman,
LLC seems to be a valid tweak for increasing stability, however so does setting the CPU Input Voltage so if they are more or less doing the same job then that answers that question smile.gif

Forceman 07-19-2013 01:37 PM

Quote:
Originally Posted by BakerMan1971 View Post

Hi Forceman,
LLC seems to be a valid tweak for increasing stability, however so does setting the CPU Input Voltage so if they are more or less doing the same job then that answers that question smile.gif

Yeah, LLC still has an impact, it is jut more indirect than it used to be. Before LLC directly affected the Vcore, now it affects the VRIN, but if VRIN drops too low (like under heavy load) then the on-board voltage regulators don't get enough voltage and so can't provide a stable Vcore, which can cause crashes. Same effect but less immediate, in a manner of speaking.

steven88 07-19-2013 01:41 PM

Great guide Darkwizzie!

Folks with Haswell....DO NOT GET DISCOURAGED! Most are stuck at 4.2-4.3ghz because they never touched their UNCORE. Once you lower your uncore down to 34x or 35x, you can easily increase your multiplier headroom. Sometimes by even 4.6ghz....thats an increase of 400mhz over an initial 4.2ghz....which is a HUGE bump in performance..... compared to the 1% loss in performance by lowering uncore down to 34x or 35x. CORE IS STILL KING. Oh yeah and please....if you have a 2400mhz memory kit...DO NOT run 2400mhz initially. Lower it to 1600mhz and try to see the max potential of the CPU, before raising the memory back to 2400mhz. Most CPUs cannot hold a high overclock (4.7ghz) with a high memory speed (2400mhz)

I have no doubt in my mind that most Haswell samples can run approx 4.5ghz, by playing with these new settings we weren't familiar with on Sandy/Ivy. Good luck thumb.gif

The Real Deal 07-19-2013 04:39 PM

step by step. I overclock since Nehalem, and my first days with Haswell, i really felt like a beginner. I still learn about my board and Haswell.


Today screen :

4,5GHz / Uncore 4000MHz / IMC 2933



Anusha 07-19-2013 05:10 PM

Thanks for the guide. So people who were limited to 4.2GHz or so at the beginning managed to get to 4.5 or 4.6 with ease after setting uncore multi to 35 ha? If this is a "fact", I'd possibly wanna try a Haswell. smile.gif

steven88 07-19-2013 05:27 PM

Quote:
Originally Posted by Anusha View Post

Thanks for the guide. So people who were limited to 4.2GHz or so at the beginning managed to get to 4.5 or 4.6 with ease after setting uncore multi to 35 ha? If this is a "fact", I'd possibly wanna try a Haswell. smile.gif

Correct....nearly the whole community were scratching their heads at why Haswell was such a poor OCer. Launch week was such a mess, with many folks claiming 4.2-4.4ghz. And they were all wondering how Linus and JJ got theirs to 4.8ghz with ease....it's because they had an extremely cherry picked unit, that could do 4.8ghz with 2400mhz RAM and full native uncore (or at least close to native 1:1)

Once a few weeks passed, people were finding out lowering the uncore opened up the headroom....and now we are here today. So hopefully more people can get their 4.5-4.6ghz by lowering the uncore. Thermals will be even more of a challenge than Ivy though....due to the FIVR under the IHS. I'm gonna say once thermals and uncore is taken care of, I'm willing to bet Haswell can OC just as well as Ivy....with maybe a slight lead to Ivy in terms of clock speed. But Haswell has the upper hand in improved IPCs at the same clock

BoredErica 07-19-2013 08:59 PM

JJ did say that we will probably have to lower uncore a little bit if we raise the CPU up to 4.6ghz or higher... he did also say that core is king but he didn't really show how useless uncore seems to be. Lowering uncore by 0.7ghz did as much difference as a change in  core clock of 0.05ghz.If people can somehow keep the thermals down, I think Haswell overclocks better. Asus said they hit it with 2 volts!

 

==

 

I added a little bit more info on PLL, input voltage, etc. Little bit more on Aida and it being seemingly easier to pass than other tests. Added a little bit more a guideline on what to expect at voltages.. 1.2, 1.27, 1.3, 1.35, 1.4, 1.5. Elaborated on my experiments with adaptive and chess.

 

TheRealDeal, I assume you're using the cooler in your siggy? What is your CPU batch number? :D


Ponteral 07-20-2013 01:04 AM

Hi all, my experience with 4770k. I had batch L313B846 Malaysia. Total crap. In AI Suite from Asus I tried optimization. It gave me 4.4 GHz at 1.344V, it was stable, but I wasn't able to get higher OC. At 4.5 Ghz I booted into Win at that was it. I have Asus Z87-PRO MB. I was very dissipointed.... It was total crap.

BTW: Before AI Suite I tried manual OC. 4.2GHz was stable at 1.220V I guess. At that moment I almos knew, that it won't be good peace. And it really wasn't.

Anusha 07-20-2013 01:18 AM

Quote:
Originally Posted by Ponteral View Post

Hi all, my experience with 4770k. I had batch L313B846 Malaysia. Total crap. In AI Suite from Asus I tried optimization. It gave me 4.4 GHz at 1.344V, it was stable, but I wasn't able to get higher OC. At 4.5 Ghz I booted into Win at that was it. I have Asus Z87-PRO MB. I was very dissipointed.... It was total crap.

BTW: Before AI Suite I tried manual OC. 4.2GHz was stable at 1.220V I guess. At that moment I almos knew, that it won't be good peace. And it really wasn't.
did you play around with the Uncore? or did you just keep it at AUTO or synced it with the core clock?

Ponteral 07-20-2013 01:27 AM

Hello to Japan and good afternoon also.. smile.gif I have a friend in Tokyo.

Well I set uncore/cache ratio first on auto than I set it on 38. So lower than cores, and it was still the same. 4.4 GHz was max.

kikibgd 07-20-2013 01:40 AM

try x34 x35
post some bios shots

Ponteral 07-20-2013 01:44 AM

Well, I can't because I sent it back to my reseller and he will give me my money back. I don't wanna have this crap anymore. So I will look for other peace. One seller here has L312B350, so I'm thinking about it... But my peace was a crap.. I'm sure about that.

kikibgd 07-20-2013 01:55 AM

check hwbot forums they have there topic on batch numbers and oc scores

Ponteral 07-20-2013 02:14 AM

Thank you, I already checked. smile.gif I checked other forums, and I have notepad with OC and Batches. but Thank you for help.. smile.gif

kikibgd 07-20-2013 02:19 AM

you could post here information that you gathered would be helpfull for other users wink.gif

BoredErica 07-20-2013 02:29 AM

Quote:
Originally Posted by Ponteral View Post

Thank you, I already checked. smile.gif I checked other forums, and I have notepad with OC and Batches. but Thank you for help.. smile.gif

Yeah... release them pl0x.


Ponteral 07-20-2013 02:31 AM

Okey. So that's it. It's all for i7-4770k. and it's the highest OC which I found. And be carefful. One peace from one batch can be great but other from same batch can be big crap.


Batch num- OC- Voltages- other notes

L309B316--4.5--1.350--
L310B479--5.0--1.262--
L310B487--5.1--1.284--
L310B488--5.2--1.249--
L310B488--5.0--1.278--
L310B489--5.0--1.290--
L310B491--4.8--1.180--
L310B492--4.7--1.260--
L311B216--4.7--1.255--
L311B411--4.7--1.280--
L311B515--4.5--1.064--
L312B152--5.0--1.344--
L312B332--5.0--1.280--
L312B350--5.0--1.250--Freeze
L312B383--4.8--1.360--
L312B383--5.0--1.350--
L312B512--5.0--1.132--
L312B515--5.0--1.385--
L313B329--5.0--1.250--

Ponteral 07-20-2013 02:57 AM

So here you got it.. wink.gif

BoredErica 07-20-2013 03:18 AM

Ahh, I see. Thanks!

I'm looking for average OC though. :|

Hmmm... lemme see how I'm going to do this. It's hard to collect data because people post current settings in the past but change to a higher overclock.


Ponteral 07-20-2013 03:21 AM

it depends what's average for you smile.gif My dream is to find some peace which can makes 5 GHz at undrer 1.4V. So that's the reason why I have only this batches, but as you can see. L310 are the best and also some L312's.. It's on you, but even this could help you.. wink.gif

Alatar 07-20-2013 03:27 AM

My little OC (Click to show)


The pic is from a few weeks back though. Right now the chip is on the stock cooler being used to play mortal kombat. But I think I'll also do proper full stress testing at some point. No need to add me to any lists though, just passing through and showing that 5ghz+ is possible with some chips.

Ponteral 07-20-2013 03:32 AM

Can you tell what is your Batch number? I really like to buy one of these great peaces... smile.gif

Alatar 07-20-2013 03:34 AM

Quote:
Originally Posted by Ponteral View Post

Can you tell what is your Batch number? I really like to buy one of these great peaces... smile.gif

Assuming you took these from hwbot:
Quote:
Originally Posted by Ponteral View Post

L309B316--4.5--1.350--
L310B479--5.0--1.262--
L310B487--5.1--1.284--
L310B488--5.2--1.249--
L310B488--5.0--1.278--
L310B489--5.0--1.290--
L310B491--4.8--1.180--
L310B492--4.7--1.260--
L311B216--4.7--1.255--
L311B411--4.7--1.280--
L311B515--4.5--1.064--
L312B152--5.0--1.344--
L312B332--5.0--1.280--
L312B350--5.0--1.250--Freeze
L312B383--4.8--1.360--
L312B383--5.0--1.350--
L312B512--5.0--1.132--
L312B515--5.0--1.385--
L313B329--5.0--1.250--

it's the one in bold tongue.gif

BoredErica 07-20-2013 03:37 AM

Well my original intention of the list was to show average overclocks, but I think I'll include the top overclocks too.

Quote:

Originally Posted by Alatar View Post

My little OC (Click to show)


The pic is from a few weeks back though. Right now the chip is on the stock cooler being used to play mortal kombat. But I think I'll also do proper full stress testing at some point. No need to add me to any lists though, just passing through and showing that 5ghz+ is possible with some chips.

If your computer name is Hippo Goes to Subzero with LD PC-V2 SS Phase Change cooler, maybe. :)


Alatar 07-20-2013 03:40 AM

Quote:
Originally Posted by Darkwizzie View Post

If your computer name is Hippo Goes to Subzero with LD PC-V2 SS Phase Change cooler, maybe. smile.gif

Don't bother with adding that OC, I'm not really 100% on it being all that stable. I'll do stress testing tomorrow probably. I just wanted to chime in as people were talking about 5ghz+.

But yeah that's the cooler.

BoredErica 07-20-2013 03:45 AM

I'm not adding yours, don't worry. :p

 

Ok guys, I'm sure there's more people in this forum that managed to get an overclock that can be posted on this table of mine... biggrin.gif


Ponteral 07-20-2013 03:46 AM

Quote:
Originally Posted by Alatar View Post

Assuming you took these from hwbot:
it's the one in bold tongue.gif

Yeah I took almost all info from there. and L310B488 seems to be best of it.. smile.gif but I can't find in my country and also on ebay.. :biggrin.gif

steven88 07-21-2013 12:30 AM

Darkwizzie, you can go ahead and add me

- 4670K 4.5GHZ

- Uncore 3.4GHZ

- 1.22vcore voltage, auto uncore voltage

- Asus Sabertooth Z87

- Noctua NH-D14

- Prime 95 Blend 80% RAM

I was very impressed with the temps at only 1.22vcore. I actually was anticipating the temps to SKY ROCKET once reaching 1.20v and up....but wow was I impressed. P95 was usually hanging out at around 60-65C. The peak it ever reached was 74C. Still very reasonable with only a D14 and no delid. I went up to 4.6ghz and 1.30Vcore....it crashed about an hour later. So I'm thinking 1.32-1.33v might just do the trick. But at 1.30vcore, I was already seeing peaks around the 93C range. A little too close for comfort IMO

Overall fairly satisfied with the 4.5ghz. I'm glad I found out about uncore and not being stuck at 4.2ghz like some folks tongue.gif

BoredErica 07-21-2013 12:38 AM

Added! Glad you like your overclock. 4.5ghz at 1.22, that's better than I did. I needed 1.27 for x45, 1.36 for x46. cheers.gif List should sync soon.


Ponteral 07-21-2013 12:41 AM

Can you tell me you batch number? I wanna write it into my notepad... :-D smile.gif Thank you

kikibgd 07-21-2013 01:14 AM

Quote:
Originally Posted by Ponteral View Post

Okey. So that's it. It's all for i7-4770k. and it's the highest OC which I found. And be carefful. One peace from one batch can be great but other from same batch can be big crap.


Batch num- OC- Voltages- other notes

L309B316--4.5--1.350--
L310B479--5.0--1.262--
L310B487--5.1--1.284--
L310B488--5.2--1.249--
L310B488--5.0--1.278--
L310B489--5.0--1.290--
L310B491--4.8--1.180--
L310B492--4.7--1.260--
L311B216--4.7--1.255--
L311B411--4.7--1.280--
L311B515--4.5--1.064--
L312B152--5.0--1.344--
L312B332--5.0--1.280--
L312B350--5.0--1.250--Freeze
L312B383--4.8--1.360--
L312B383--5.0--1.350--
L312B512--5.0--1.132--
L312B515--5.0--1.385--
L313B329--5.0--1.250--


damn i got L310B479 and i cant do much with it i guess i am doing something wrong....
waiting for clu and h220

Ponteral 07-21-2013 01:17 AM

Well it's still depends specific piece. So it's not easy to say that all cpu¨s from L310B479 will be awesome. 75/100 could be great and rest of it bad.. anyway, what is your max OC for now?

kikibgd 07-21-2013 02:17 AM

tryed 4.4 but cant get it stable on 1.25 bsod on prime after 1h, aida pass 6h but also heat is killing me need to delid it and h220 and clu will arrive till the end of the next week i hope then i will see how far i can go

Ponteral 07-21-2013 02:34 AM

well I also got 4.4 and that was max... L313B846. So I'm now looking for other... I'll see, but if I got good peace I will delid it also. wink.gif

BakerMan1971 07-21-2013 02:35 AM

Hi Steven88

What values did you use for CPU Cache Ration (Min) & (Max) fields for your uncore settings?

I am going to start experimenting with those to raise my 4.2 OC to something a little more firey smile.gif

BoredErica 07-21-2013 02:58 AM

He said uncore x34. So probably min/max both at x34.


kikibgd 07-21-2013 02:59 AM

i could boot at 4.7 but unstable during stress, i need more volts but my crapcooler dont let me put more

Ponteral 07-21-2013 03:09 AM

Well, that's nice. I guess you don't have bad chip. If you can boot at 4.7 that's good. What is your voltage for that clock?

kikibgd 07-21-2013 03:10 AM

1.31 with offset 0.015 i guess it needs 1.38 to be stable i hope biggrin.gif

BoredErica 07-21-2013 03:11 AM

Well booting into a high clock isn't much, it all comes down to how much voltage. It's pretty hard to overheat when booting into Windows... so you can just ramp up voltage to unrealistic heights until it boots if you have a horrible CPU. I'm not saying that's what he did, of course. Without voltage there's really no way to tell if the CPU is good or bad.


steven88 07-21-2013 03:13 AM

Quote:
Originally Posted by BakerMan1971 View Post

Hi Steven88

What values did you use for CPU Cache Ration (Min) & (Max) fields for your uncore settings?

I am going to start experimenting with those to raise my 4.2 OC to something a little more firey smile.gif

Hey Bakerman, I put it at 34x uncore, both min and max (just like DarkWizzie stated). Let us know how it goes! Most are stuck at 4.2ghz or so, due to running native 1:1 uncore to multiplier. Only the most cherry picked units are able to run a high multiplier and high uncore

Ponteral, I'm gonna have to get back to you regarding the batch number. It's actually my friend's rig....and everything is at his house right now. I'll ask him as soon as I can! thumb.gif

Ponteral 07-21-2013 03:15 AM

Quote:
Originally Posted by kikibgd View Post

1.31 with offset 0.015 i guess it needs 1.38 to be stable i hope biggrin.gif

Well so, if you delid I guess under 1.4V will be 4.7 GHz max... but it's still not bad chip, I'll call it average chip, I don't know where you wanna push it, but I want to have it max at 1.4V... smile.gif

BoredErica 07-21-2013 03:37 AM

I was originally thinking of getting 4.7ghz... I'm at 1.36v for 4.6ghz on AIR. For 4.7ghz I might have to delid/watercool so I'll stay with 4.6ghz.


kikibgd 07-21-2013 04:42 AM

my main parameter is temperature, so i want to keep it around ~85c during tests , i will delid and h220 will arrive, also i dont believe i will push more then 1.4v only if really needed then yes biggrin.gif

Ponteral 07-21-2013 04:49 AM

Quote:
Originally Posted by Darkwizzie View Post

I was originally thinking of getting 4.7ghz... I'm at 1.36v for 4.6ghz on AIR. For 4.7ghz I might have to delid/watercool so I'll stay with 4.6ghz.

Maybe I missed your batch number? what you got? and what is your model 4770k or 4670k? Thank you.

The Real Deal 07-21-2013 07:22 AM

Hi,

CPU : 45X100 (more is doable but i like to keep the temps at 80-85 max when AVX)
Uncore : set to Auto to keep the idle function at 800MHz / Load 4000MHz (but it SPi32M at 1:1)
RAM : 2933MHz




BangBangPlay 07-21-2013 11:55 AM

So I have been running at 4.6 (38x Uncore Min/Max) @ 1.215V for a few weeks and not a single issue. This clock is Linpack stability tested. Recently I decided to try 4.5 GHz at 1.180V and I'm stability testing it now. I noticed that it runs up to 10C cooler than 4.6 in most synthetic benchmarks and it allows me to increase the Uncore beyond 38 and is still stable. Now I may switch to the 45 for better thermals and overall longevity of the chipset. I mostly game and do a little video compression, so I am not beating it up by any means. I am just surprised at the dip in temps going from 1.180 to 1.215.

I know these are very low compared to some of the voltages posted here, but I just don't see a need to run mine at 4.6. To me it seems like every chip has a sweet spot that it really likes, and everything above that is just pushing it. What do you guys think? I am by no means uncomfortable with keeping it 4.6, it has been running fine. I am just surprised at the difference in temps going from one to the other. With large problems 4.5 only gets up to 80-82 in Linpack runs, while 4.6 can hit 90-92C easy. 4.5 just seems to be a better 24/7 clock, but maybe I am just being paranoid.

Ponteral 07-21-2013 12:16 PM

Well, I read in owners topic, that linpack is the best for testing OC stability. Can you tell me how to setup it for the best testing? Thank you

The Real Deal 07-21-2013 12:28 PM

Quote:
Originally Posted by BangBangPlay View Post

So I have been running at 4.6 (38x Uncore Min/Max) @ 1.215V for a few weeks and not a single issue. This clock is Linpack stability tested. Recently I decided to try 4.5 GHz at 1.180V and I'm stability testing it now. I noticed that it runs up to 10C cooler than 4.6 in most synthetic benchmarks and it allows me to increase the Uncore beyond 38 and is still stable. Now I may switch to the 45 for better thermals and overall longevity of the chipset. I mostly game and do a little video compression, so I am not beating it up by any means. I am just surprised at the dip in temps going from 1.180 to 1.215.

I know these are very low compared to some of the voltages posted here, but I just don't see a need to run mine at 4.6. To me it seems like every chip has a sweet spot that it really likes, and everything above that is just pushing it. What do you guys think? I am by no means uncomfortable with keeping it 4.6, it has been running fine. I am just surprised at the difference in temps going from one to the other. With large problems 4.5 only gets up to 80-82 in Linpack runs, while 4.6 can hit 90-92C easy. 4.5 just seems to be a better 24/7 clock, but maybe I am just being paranoid.


At your 4,6 voltage, my CPU hit 80-84 under LinX AVX (and it's really warm out there) ; the cooler is a part of the equation wink.gif

Then AVX stress tests are not representative of a daily usage. Just make a BF3 or whatever and report your temps @ 4,6GHz wink.gif

BakerMan1971 07-21-2013 12:30 PM

Thankyou everyone for clarifying the uncore, I will post my results once I have time to do some testing smile.gif

BoredErica 07-21-2013 12:34 PM

Quote:
Originally Posted by Ponteral View Post


Maybe I missed your batch number? what you got? and what is your model 4770k or 4670k? Thank you.

I posted it in the thread chart. 

 

Batch 330 Costa Rica 4670k.

 

The guide represents my opinion on Linpack. If that's your line between stable/unstable and hot/not too hot, your OC will be nerfed by the stress test because it will be excessively hot.


BangBangPlay 07-23-2013 09:33 AM

Quote:
Originally Posted by The Real Deal View Post

At your 4,6 voltage, my CPU hit 80-84 under LinX AVX (and it's really warm out there) ; the cooler is a part of the equation wink.gif

Then AVX stress tests are not representative of a daily usage. Just make a BF3 or whatever and report your temps @ 4,6GHz wink.gif

Yeah, I had it at 4.5 for a few days and then switched back to 4.6. The difference in temps while not stress testing was minute. With that being said I do believe that 4.6 will be a sweet spot for some, and anything above that is just excess heat and wear and tear on your CPU. The last thing I want to do is have to swap this chip for another and renter the Haswell lottery. So maybe that is why I was cautious to begin with.

katatoni 07-23-2013 05:34 PM

Thank you for this guide Darkwizzie, like many others I had completely missed out on lowering Uncore that drastically and how little effect it has on performance. Will definitely play around some with this new information.

What I've been using before reading this post:

CPU: 4670k
Core Mult: 42
Uncore: Auto
Vcore: 1.19 adaptive
Uncore volt: Auto
Cooler: H80i (2x Gentle Typhoon 1850rpm)
Ram speed: 1333mhz (kept it on default thus far)
Batch #: L310B515 - Noticed The Real Deal has the same batch, which is just about the first person I see with this batchnumber besides myself.
Stability tested: Not very properly. Standard IBT and an hour of OCCT (~61-65avg, maxing around 72 I believe). Will do it more properly when I go for higher OC's, but it's been fine playing games with for now.

Hopefully I'll have better numbers posted in the coming days!

Edit: A question about the graphs from the OP. In the report from Skyrim, the 4.5ghz with 3.5 uncore is getting a better result than 4.6ghz with 3.4 uncore. Does this mean that for gaming, uncore affects performance more than for things like Cinebench for example?

Edit 2: Guess I might not be so lucky. Tried a 4.4ghz (3.4 uncore still) with 1.27 Manual Vcore / Auto uncore voltage. Started up prime95 blend and things were looking fine for the "long" tests, with temps around 66-70, maxing out at 76 for a second on one core. Then after 20min it switched to the Short test, and temps rose very fast to high-80s, hitting 93 as max and thus I immediately stop the test as this is simply running to hot at least for me to feel safe. Back to the drawing board I guess.. With vcore at 1.25 I would get blue screen when booting, with artifacts (which was odd to me because I've never seen that when it wasn't related to GPU before)

Of note in regards to this, 3 of the screw threads that fasten the h80i radiator to the chassi broke upon initial install yesterday even though I was being quite careful. I 'fixed' this by using screw thread tape (if that's the word in english) and it's decently fastened, but I can "pull" it some. Could this affect temps? Sorry if this is a stupid question, and probably also the wrong section for this.

BoredErica 07-23-2013 09:02 PM

Quote:
Originally Posted by katatoni View Post

Thank you for this guide Darkwizzie, like many others I had completely missed out on lowering Uncore that drastically and how little effect it has on performance. Will definitely play around some with this new information.

What I've been using before reading this post:

CPU: 4670k
Core Mult: 42
Uncore: Auto
Vcore: 1.19 adaptive
Uncore volt: Auto
Cooler: H80i (2x Gentle Typhoon 1850rpm)
Ram speed: 1333mhz (kept it on default thus far)
Batch #: L310B515 - Noticed The Real Deal has the same batch, which is just about the first person I see with this batchnumber besides myself.
Stability tested: Not very properly. Standard IBT and an hour of OCCT (~61-65avg, maxing around 72 I believe). Will do it more properly when I go for higher OC's, but it's been fine playing games with for now.

Hopefully I'll have better numbers posted in the coming days!

Edit: A question about the graphs from the OP. In the report from Skyrim, the 4.5ghz with 3.5 uncore is getting a better result than 4.6ghz with 3.4 uncore. Does this mean that for gaming, uncore affects performance more than for things like Cinebench for example?

Edit 2: Guess I might not be so lucky. Tried a 4.4ghz (3.4 uncore still) with 1.27 Manual Vcore / Auto uncore voltage. Started up prime95 blend and things were looking fine for the "long" tests, with temps around 66-70, maxing out at 76 for a second on one core. Then after 20min it switched to the Short test, and temps rose very fast to high-80s, hitting 93 as max and thus I immediately stop the test as this is simply running to hot at least for me to feel safe. Back to the drawing board I guess.. With vcore at 1.25 I would get blue screen when booting, with artifacts (which was odd to me because I've never seen that when it wasn't related to GPU before)

Of note in regards to this, 3 of the screw threads that fasten the h80i radiator to the chassi broke upon initial install yesterday even though I was being quite careful. I 'fixed' this by using screw thread tape (if that's the word in english) and it's decently fastened, but I can "pull" it some. Could this affect temps? Sorry if this is a stupid question, and probably also the wrong section for this.

 

Hey, thanks for the info. Please keep me updated if you manage to wiggle out a better result! For some people uncore didn't help but for me and some others it made a world of difference. Haswell reeks of hit-or-miss-ness.

 

About Skyrim results: We have to keep in mind that CPU affects gaming less as a general rule. Even when we chug higher core clocks, the result won't be massive... Skyrim is a little bit more CPU dependent, that is why I chose that. I benchmarked it in a town to try to up the CPU usage (a benchmark while in combat is not practical). But uncore is less of a factor than core clock as well. So while the effects of uncore is already small, it's made smaller by the fact it's a game. I do expect uncore difference to be a little more noticeable in Cinebench or Chess as these are CPU benchmarks... But I'm not sure if uncore is making a larger difference compared to a change in core clock or if it's simply a result of CPU mattering more in a CPU benchmark.

 

Regarding your cooler issue: I'm not sure what you mean, and I'm not very experienced with water cooling. I've stuck with air so far, maybe somebody else knows more. And about your overclock... could you squeeze out  x43? From my personal experience and from word of mouth, it seems the effect of lower uncore on ability to adjust core clock tends to be more pronounced in higher GHZ ranges to begin with. Maybe if you had a better thermal solution... devil.gif


katatoni 07-23-2013 09:46 PM

I will definitely try to find a stable 4.3 if I can't lower the temps with 4.4. I was expecting 4.5 would work fine with the h80i but it seems I need to lower my expectations a bit.

Might be that reseating the pump would help, but since temps are fine except during the "8k self-test" in prime95 with the 4.4 I'm not sure that's the case. At 4.2 (with auto uncore) it got up to 80C max, with temps around 60-65 during the other parts of the blend-test.

critical98 07-23-2013 10:07 PM

Quote:
Originally Posted by katatoni View Post

I will definitely try to find a stable 4.3 if I can't lower the temps with 4.4. I was expecting 4.5 would work fine with the h80i but it seems I need to lower my expectations a bit.

Might be that reseating the pump would help, but since temps are fine except during the "8k self-test" in prime95 with the 4.4 I'm not sure that's the case. At 4.2 (with auto uncore) it got up to 80C max, with temps around 60-65 during the other parts of the blend-test.

I found the H80i struggled with my particular 4770K when I started pushing above [email protected] The H100i was better by a few degrees but not enough to make it worth reconfiguring the insides of my rig. The Swiftech H220 finally opened it up for much higher overclocks.

BoredErica 07-23-2013 10:23 PM

Quote:
Originally Posted by critical98 View Post


I found the H80i struggled with my particular 4770K when I started pushing above [email protected] The H100i was better by a few degrees but not enough to make it worth reconfiguring the insides of my rig. The Swiftech H220 finally opened it up for much higher overclocks.

I thought H220 is performance equal to Krakex 60 but quieter?


critical98 07-23-2013 11:42 PM

Quote:
Originally Posted by Darkwizzie View Post

I thought H220 is performance equal to Krakex 60 but quieter?

I haven't tested the X60 myself so I would hesitate to comment. However, there have been plenty of comparisons out there and they're fairly close. The selling point for me was better-than-H100i performance and expandability down the road for a water-cooling newbie. Anyways, this is all meaningless now since the H220 can't be bought in the U.S. anymore.

PolRoger 07-25-2013 01:19 PM

This overclock looks to be promising for daily 24/7 use... ~26hrs+ "crunching" Rosetta 8 threads 100% load!

BIOS settings:

CPU Core: 1.205v
CPU Cache/Ring: 1.125v
CPU S/A: +.100v
CPU Digital I/O: +.100v (Auto)
CPU Analog I/O: +.000v (Auto)
DRAM: 1.625v
CPU Input: 1.800v


i7-4770K4625GHzDDR3-2666C10Rosetta26hrsload_zps59126fae.png~original

BoredErica 07-25-2013 07:35 PM

Quote:
Originally Posted by PolRoger View Post

This overclock looks to be promising for daily 24/7 use... ~26hrs+ "crunching" Rosetta 8 threads 100% load!

BIOS settings:

CPU Core: 1.205v
CPU Cache/Ring: 1.125v
CPU S/A: +.100v
CPU Digital I/O: +.100v (Auto)
CPU Analog I/O: +.000v (Auto)
DRAM: 1.625v
CPU Input: 1.800v


i7-4770K4625GHzDDR3-2666C10Rosetta26hrsload_zps59126fae.png~original

Results documented, thank you!


BangBangPlay 07-25-2013 07:56 PM

Hey Darkwizzie, any conclusions or graphs drawn from the data collected? My theory is that the batch number has little to do with OC potential and general performance, but who knows. Maybe there is a potent batch, or maybe it all depends on some laborer in the third world. On a side note I lived in Costa Rica for 6 years, but my chip is Malaysian. Let us know when you start to crunch the numbers...

katatoni 07-25-2013 08:00 PM

Quote:
Originally Posted by BangBangPlay View Post

Hey Darkwizzie, any conclusions or graphs drawn from the data collected? My theory is that the batch number has little to do with OC potential and general performance, but who knows. Maybe there is a potent batch, or maybe it all depends on some laborer in the third world. On a side note I lived in Costa Rica for 6 years, but my chip is Malaysian. Let us know when you start to crunch the numbers...

The only other person I've seen with the same batch as mine (L310B515) is getting much better results with his than I have had with mine. Just having 2 to compare is a bit low obviously, but still wink.gif

Forceman 07-25-2013 08:07 PM

Quote:
Originally Posted by BangBangPlay View Post

Hey Darkwizzie, any conclusions or graphs drawn from the data collected? My theory is that the batch number has little to do with OC potential and general performance, but who knows. Maybe there is a potent batch, or maybe it all depends on some laborer in the third world. On a side note I lived in Costa Rica for 6 years, but my chip is Malaysian. Let us know when you start to crunch the numbers...

Do we even know for certain what the batch number is tied to? Does every die from a given wafer have the same batch number? Are multiple wafers included in a batch? Are the batch numbers even tied to wafers at all?

It makes sense that there are going to be good wafers and bad wafers, and good and bad dies within each wafer (I've heard the ones near the center tend to be better, but I don't know how anyone besides Intel would know that, or where a given die came from on the wafer). I just wonder if batch number is at all correlated to performance now. You'd probably need Intel's data on batch number and VID to know for sure.

BoredErica 07-25-2013 08:36 PM

Quote:
Originally Posted by BangBangPlay View Post

Hey Darkwizzie, any conclusions or graphs drawn from the data collected? My theory is that the batch number has little to do with OC potential and general performance, but who knows. Maybe there is a potent batch, or maybe it all depends on some laborer in the third world. On a side note I lived in Costa Rica for 6 years, but my chip is Malaysian. Let us know when you start to crunch the numbers...

I'll take a closer look at the data (and start organizing the chart a little better) when I wake up tomorrow. thumb.gif

For now, hoping more people post their settings! Get the word out. :)


JessePotter 07-26-2013 12:48 AM

Give me a few more days and I'll post my results. I have a 4770K batch# L313B329 Malaysia sitting right here in front of me waiting for the rest of the components to arrive.

PolRoger 07-26-2013 07:06 AM

Quote:
Originally Posted by Darkwizzie View Post

Results documented, thank you!

You have my memory speed entered in the spreadsheet as "1333" when it was actually running at "2666".

BoredErica 07-26-2013 07:12 AM

Quote:
Originally Posted by PolRoger View Post


You have my memory speed entered in the spreadsheet as "1333" when it was actually running at "2666".

Fixed. thumb.gif


BangBangPlay 07-26-2013 09:43 AM

Quote:
Originally Posted by Forceman View Post

Do we even know for certain what the batch number is tied to? Does every die from a given wafer have the same batch number? Are multiple wafers included in a batch? Are the batch numbers even tied to wafers at all?

It makes sense that there are going to be good wafers and bad wafers, and good and bad dies within each wafer (I've heard the ones near the center tend to be better, but I don't know how anyone besides Intel would know that, or where a given die came from on the wafer). I just wonder if batch number is at all correlated to performance now. You'd probably need Intel's data on batch number and VID to know for sure.

Good point, but I am downplaying the batch importance either way. I was just joking about the third world employee's impact of course. I found an interesting article about batch numbers (with Ivy Bridge) and what they mean. The batch number is given at the time manufacture (assembly to heatsink) and boxing, and all chips are extracted from the wafer here in the US and then sent to their relative manufacturing plants around the world. The first letter/number corresponds to the location of the assembly plant, and the second number is the final digit of the year of production. The next two numbers are the week of that year, and the 5th letter corresponds to the stepping level (A,B, or C). The last numbers have to do with lot numbers, and sterilization code.
Quote:
Example: L707A723 —

1st letter or digit = plant code: (Malaysia)
0 = San Jose, Costa Rica
1 = Cavite, Philippines
3 = Costa Rica
6 = Chandler, Arizona
7 = Philippines
8 = Leixlip, Ireland
9 = Penang, Malaysia
L = Malaysia
Q = Malaysia
R = Manila, Philippines
Y = Leixlip, Ireland

2nd digit = Year of production: (2007)
3rd & 4th digits = week: (7th week )
5th digit = Stepping (A or B or C)
6th – 8th digits = lot number: (723)
10th – 13th digits = serialization code (—)

Stepping A = less volt more heat (best with full water cooling).
Stepping B = more volt less heat (best with air or entry water cooling).

FtW 420 07-26-2013 01:14 PM

Quote:
Originally Posted by BangBangPlay View Post

Good point, but I am downplaying the batch importance either way. I was just joking about the third world employee's impact of course. I found an interesting article about batch numbers (with Ivy Bridge) and what they mean. The batch number is given at the time manufacture (assembly to heatsink) and boxing, and all chips are extracted from the wafer here in the US and then sent to their relative manufacturing plants around the world. The first letter/number corresponds to the location of the assembly plant, and the second number is the final digit of the year of production. The next two numbers are the week of that year, and the 5th letter corresponds to the stepping level (A,B, or C). The last numbers have to do with lot numbers, and sterilization code.


The info you have there is not quite right, it is

Example: L707A723 ---

1st letter or digit = plant code: (Malaysia)
0 = San Jose, Costa Rica
1 = Cavite, Philippines
3 = Costa Rica
6 = Chandler, Arizona
7 = Philippines
8 = Leixlip, Ireland
9 = Penang, Malaysia
L = Malaysia
Q = Malaysia
R = Manila, Philippines
Y = Leixlip, Ireland

2nd digit = Year of production: (2007)

3rd & 4th digits = week: (7th week )

5th - 8th digits= lot number: (723)

10th - 13th digits = serialization code (---)

The letter isn't a stepping, & it has no relation to heat or voltage.

steven88 07-26-2013 07:27 PM

Quote:
Originally Posted by Ponteral View Post

Can you tell me you batch number? I wanna write it into my notepad... :-D smile.gif Thank you

Sorry for the delay. My batch number is L310B443

Darkwizzie, can you add that onto your list too? My batch is L310B443

BoredErica 07-26-2013 10:33 PM

Done.


Ponteral 07-27-2013 12:30 AM

Well guys, I finally found batch L310B488. So I will buy it... I hope it will be good as this batch in global is... let's hope.

BakerMan1971 07-27-2013 09:42 AM

Update on my overclock

with my uncore still locked at 34
I have now got my cpu at 43
with vcore all the way up at 1.27 just to get it to be stable (as far as I know) running some prime and some grid2 about 4 hours so far , lets see how it goes.

BoredErica 07-27-2013 09:47 AM

Ok, updated. 1,27 for 43, it's not that stellar of a cpu. :(


BakerMan1971 07-27-2013 02:33 PM

Nope its not stellar, any hints on bettering through settings would be appreciated smile.gif

Belial 07-27-2013 04:40 PM

Using H264 benchmark as my stress test. This will likely be near my final results. I think h264 is not good for ram testing, this fails in 5 min of p95 so i'm going to find a better 24/7 stress tester (the cpu doesnt, its ram). I've been able to hit higher overclocks using BCLK and BCLK straps than multi alone.

47x102.14=4.8ghz @ 1.44vcore/2.03VRIN
4.5ghz Uncore @ 1.3VRING
IMC/VTTs +.2v (set and forget)
78C Max Temp non-AVX stress test, hits ~83C on AVX, ~90C on Small FFT



Belial 07-27-2013 08:09 PM

wow h264 benchmarkl is awful, i cant pass 15 minutes of p95... but p95 small fft so hot...

ugh wish there was a better stress test than 24 hours of prime95.

Forceman 07-27-2013 08:29 PM

You tried the AVX2 version of Linpack?

Ryude 07-27-2013 09:36 PM

You can add my results if you like. I posted it in the Haswell owners thread.

BoredErica 07-27-2013 10:17 PM

Quote:
Originally Posted by Belial View Post

Using H264 benchmark as my stress test. This will likely be near my final results. I think h264 is not good for ram testing, this fails in 5 min of p95 so i'm going to find a better 24/7 stress tester (the cpu doesnt, its ram). I've been able to hit higher overclocks using BCLK and BCLK straps than multi alone.

47x102.14=4.8ghz @ 1.44vcore/2.03VRIN
4.5ghz Uncore @ 1.3VRING
IMC/VTTs +.2v (set and forget)
78C Max Temp non-AVX stress test, hits ~83C on AVX, ~90C on Small FFT


 

What ram speed and batch? Hard to see, picture is blurry when zoomed in.
Already done, Ryude.


Gurkburk 07-28-2013 12:37 AM

Rather than starting a new thread, i guess ill post here.

I got a Haswell the other day and have delidded it. Temps dropped from 96-100*C to max79-80*C in Intelburn Test @ 4.5Ghz/1.250V.


I'm currently at 4.6Ghz/1.350V(I believe) and I wanna go Higher with the Clocks. I havent tried going above 1.38V yet, is it safe to go that high as 1.4v?

My speccs:

Asus Maximus VI Hero
CPU QuadCore Intel Core i7-4770K, 4600 MHz (46 x 100)
Ram: Corsair XMS3 CMX8GX3M4A1600C9 4x, 8Gb total.
Gpu: Gigabyte 780
PSU: XFX Core Edition 650W 80+ Bronze

Belial 07-28-2013 02:47 AM

Quote:
Originally Posted by Forceman View Post

You tried the AVX2 version of Linpack?

a few times, gets way too hot. I took off the front panel of my case (allows uninterrupted air flow to my h110 now), so now I can do small fft at 90C max temp in prime95, im using p95 as my stress tester again. Any recommendations on linpack avx2 for stress testing, how long to run it, is it bette rthan p95, etc?
Quote:
What ram speed and batch? Hard to see, picture is blurry when zoomed in.
Already done, Ryude.

I'm running 2800mhz CL12-14-12-26 with very tight, manually input subs, but still fine tuning. It's the Gskill Ripjaws X 2x4gb 2400 CL11-13-13-31 kit for $63 on newegg, you can ge tit on $56 after that memory coupon you get anytime you make a purchase at newegg. They are hynix CFRs. They validate 3.2ghz easily.

BoredErica 07-28-2013 09:28 AM

Quote:
Originally Posted by Gurkburk View Post

Rather than starting a new thread, i guess ill post here.

I got a Haswell the other day and have delidded it. Temps dropped from 96-100*C to max79-80*C in Intelburn Test @ 4.5Ghz/1.250V.


I'm currently at 4.6Ghz/1.350V(I believe) and I wanna go Higher with the Clocks. I havent tried going above 1.38V yet, is it safe to go that high as 1.4v?

My speccs:

Asus Maximus VI Hero
CPU QuadCore Intel Core i7-4770K, 4600 MHz (46 x 100)
Ram: Corsair XMS3 CMX8GX3M4A1600C9 4x, 8Gb total.
Gpu: Gigabyte 780
PSU: XFX Core Edition 650W 80+ Bronze

1.4v Should be safe.

 

Belial: Avx2 Linkpack stressing from what I've heard is the ultimate heat stressing test. It's one of the harder tests to pass. if you can pass it and a bit of Prime I think you're good yo go.


katatoni 07-28-2013 12:44 PM

RMA'd my H80i and just installed the replacement and no screw threads broke this time, so it's properly tightened. Temps in the new linpack at stock (only change was setting manual vcore at 1.1V) and temps are 10-15C lower than before. Hopefully means I can get some better results to post soon without hitting insane temps..

BoredErica 07-28-2013 01:29 PM

For now I reverted back to 4.5ghz... I could technically, raise voltage to 1.4 and then just never, ever stress to stay on 4.6 though.


katatoni 07-28-2013 05:59 PM

CPU: 4670k
Core Mult: 43
Uncore: 43
Vcore: 1.23
Uncore volt: 1.25
Cooler: H80i
Ram speed: 1866mhz
Batch #: L310B515
Stability tested: AIDA64, and a quick (20min) Prime95 test with custom settings (1792 max size, 4096mb memory to use, 5min per size)

Well, it's an improvement over what I got before changing out the H80i for a new one. Seems I'll need to go up to 1.275v for 44x sadly :/
Temps maxed out in p95 during 8k length at 79C on these settings. Not quite sure how high I'm comfortable going, and I imagine the jump at 1.275v will be quite drastic if I go for 44x

BoredErica 07-28-2013 10:07 PM

79C is definately OK for stress. For the purpose of stress I feel anything under 90 is A-OK. Keep in mind I mean stress temps. You don't set up a computer to stress it every night. Normal usage will be nowhere near that high AND, under 90 is perfectly safe.

 

Results charted, thanks for the update.


katatoni 07-28-2013 10:19 PM

Quote:
Originally Posted by Darkwizzie View Post

79C is definately OK for stress. For the purpose of stress I feel anything under 90 is A-OK. Keep in mind I mean stress temps. You don't set up a computer to stress it every night. Normal usage will be nowhere near that high AND, under 90 is perfectly safe.

Results charted, thanks for the update.

Yeah, I tried the OC out for a while tonight, setting up adaptive and playing some games for a couple of hours. Temps never rose above 55C. Trying out 4.5ghz now at 1.29 (with uncore at auto/auto and ram at 1333 for the time being) and I might be able to keep that under 90C in p95 small FFT's as well. Just tried a couple of minutes at the 8k, which is what usually gives me highest temps, and it maxed out at 87. Will see how far I dare go I suppose. smile.gif

foxrena 07-28-2013 10:20 PM

Here is my result, 4770K @ 5Ghz, can bench AIDA stability test at 1.475V:
Uncore is at x42 IIRC
Cooling is custom TEC block at about 5C, CPU is delided and liquid pro between IHS and silicon die.


steven88 07-28-2013 10:22 PM

Quote:
Originally Posted by Darkwizzie View Post

79C is definately OK for stress. For the purpose of stress I feel anything under 90 is A-OK. Keep in mind I mean stress temps. You don't set up a computer to stress it every night. Normal usage will be nowhere near that high AND, under 90 is perfectly safe.

Results charted, thanks for the update.

Yup, I can certainly agree....I would say even the most CPU intensive games such as BF3...it will run about 20C cooler on average than your typical P95 stress test....its that big of a difference:D

So yeah, if you get 90C in a stress test, you should easily be looking at 70C or lower with a typical game....which is much more acceptable temp by the overclocking community.

BoredErica 07-28-2013 10:33 PM

Quote:
Originally Posted by foxrena View Post

Here is my result, 4770K @ 5Ghz, can bench AIDA stability test at 1.475V:
Uncore is at x42 IIRC
Cooling is custom TEC block at about 5C, CPU is delided and liquid pro between IHS and silicon die.

Ring bus voltage, batch, and ram speed please. :) Results charted.

1.36 turned out not to be stable enough for my liking. I could push 1.38 and probably get rock solid, but I reverted to 1.275v and 4.5ghz for now. Will play with it more in the future.

1.38 on air... somebody's going to kill me. I only had 78C on chess, which heats things up more than a game. I'd reckon I'd hit above 80C for 1.38 though. That might be a lot to take, ESPECIALLY since chess and adaptive = 0.025 more voltage.


ScottyP 07-29-2013 05:32 AM

I am new to OCing. I have a 4770k with an h100i for cooling.

I have no idea where to begin. The only thing I've OC'd atm is my RAM, and that's just the XMP @ 2400mhz >.>

What is the best program to use for stressing and monitoring, etc. ? Any information would be helpful and appreciated. smile.gif

BoredErica 07-29-2013 08:15 AM

Quote:
Originally Posted by ScottyP View Post

I am new to OCing. I have a 4770k with an h100i for cooling.

I have no idea where to begin. The only thing I've OC'd atm is my RAM, and that's just the XMP @ 2400mhz >.>

What is the best program to use for stressing and monitoring, etc. ? Any information would be helpful and appreciated. smile.gif

Step one: Revert your RAM OC back to default, no XMP. Reason: Upping ram might decrease CPU overclockability. Do ram last.

Read my guide, it really has all the info laid out.

 

Go to your bios.

The uncore may also affect your CPU overclockability like ram does, and it barely does anything so set it manually to default (x34 or x35). That means, where the motherboard option says "cache ratio" or "ring bus" or "uncore", instead of "AUTO", set it to 34 or 35.

 

To save time, try this: Set your core multiplier to 40. Set your core voltage to MANUAL instead of ADAPTIVE or OFFSET. Set the core voltage to 1.2V. This is a good starting overclock which most  people can hit without trouble. If you cannot hit it, you have a seriously dud CPU.

 

Being upping your core multiplier until it fails stress test. Once it does, up the voltage slightly. 1.2v, 1.21v, 1.22v, etc. Once when you stress you hit temperatures hitting 90C or higher, you need to either stop stressing from now on with synthetic stress test or you need to stop touching the voltage, meaning your main overclock is done.

 

THEN, try to find best combination of higher uncore or XMP ram that gives you the performance you want.

 

THEN, set core voltage mode to adaptive and do not use synthetic stress test with adaptive mode on.

 

THEN, set the C states to on.


Gurkburk 07-29-2013 01:06 PM

Maaan... I'm having issues with my OCing.

I can't step up to 4.7Ghz on 1.415V even.... Should i stop trying? :S

I get BSOD before i can get a test to run more than 2 minutes >,< Temps are partially fine. 85-90*C at that volt and clock.


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