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Skylake Overclocking Guide [With Statistics] - Page 7

post #61 of 11368
Quote:
Originally Posted by llantant View Post

Do you have spread spectrum turned on?
Yup, I do. I didn't feel the need to disable it to overclock my last processor, a 2600K, so this time i've stuck with it. Should i disable it?

THX frosted, i also thought that the BIOS readings should be more accurate.
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post #62 of 11368
Quote:
Originally Posted by Guzmanus View Post

Yup, I do. I didn't feel the need to disable it to overclock my last processor, a 2600K, so this time i've stuck with it. Should i disable it?

THX frosted, i also thought that the BIOS readings should be more accurate.

There's no need to have it on.

With my 2600k I have to disable to get 4.6+ or I will get Bsod124. Not sure if it will have any effect on your voltage but I would def suggest having it turned off as it's been said to hinder overclocking. I know it fluctuated the bclk hence why you are at 99.xx, that in itself would annoy the hell out of me.
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post #63 of 11368
Well think I'm all done with stability testing! Got my 8 hour realbench pass.

I'll post up my final settings when I finish working with my RAM.

4.6GHz (46x100)
4.0GHz Uncore
1.325 vcore (in bios), 1.328V load, 1.344 idle in CPU-Z
LLC on Level 5 (found to be the best)

Max temp was 77C on hottest core.

Took this screenshot just before the 8 hour realbench test completed.

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post #64 of 11368
Quote:
Originally Posted by gothuevos View Post

Finally have a 6700k on the way so I hope to contribute soon, but so far from reading threads like this I feel very, very underwhelmed.

People needing near max recommended voltages just for 500-600 mhz overclocks?
Stock clock is 4GHz for 6700K, so yeah that's about right you can add on average about 500MHz which is +12.5%.
In fact in lots of the reviews I've seen on launch the OC was around 4.5 on average. But as someone pointed out here already, don't rely on reviews, the people sometimes don't know what they are doing. Sad but it's how it turned out, the enthusiasts are mostly gone from writing reviews and reviews well it has turned more to news and advertising honestly, selling and making money than providing technically difficult reviews, doing things you can't do without expensive equipment and tons of time. Some still do, sure but it has become rare.
If someone is expecting to do a +1GHz OC, get a lower clocked i5, those can do it.
Quote:
Originally Posted by Darkwizzie View Post

So far, not looking too good, yeah. Thought the range was supposed to be 4.5-4.8. Although some of you guys probably could squeeze in another 100mhz from ditching prime... (like srsly).

I've reverted the OP to an earlier version to sidestep the edit glitch I've been having. Back to work. redface.gif  
Are you running Skylake atm? Your siggy says otherwise. I'm trying to figure out if adaptive voltage causes vcore to explode on Prime.

I don't see an option to turn off features which will make v28.5 behave like v27.9 under stressing.
No I'm going to stay with DC, there is no reason to upgrade to SL from DC, HW, probably not even from IB unless it's limiting you. SL performance gain over DC is minimal but at least it can keep up unlike BW.

Read the undoc.txt for Prime95, I've posted some options above in a post that can change the code paths and disable CPU features, there are more tweaks in P95. It's all in the files, don't look for it in the primitive GUI.

BCLK from a technical POV should be less of a hindrance now for OC since it's once again separated and the peripherals have their own clock locked stable at 100MHz.

It's hard to find official info about SL, because Intel is so secretive about it and hasn't yet released much of it officially.

Edited by JackCY - 8/22/15 at 2:26pm
post #65 of 11368
I wonder if people here would be able to help me, it won't take much time. I'm trying to help troubleshoot a program that I've found very useful in the past. The latest version of Argus Monitor on the website doesn't support Skylake properly, or the z170 Super IO chips, at least not on the Z170 Deluxe, but I've been working with the programmer to try and get the Speedstep/Turbo Core frequency graphs working.

The programmer thinks there is a program on my system that is also polling the core speed registers in the CPU and stopping Argus from getting a reading and locking the display at 4GHz. I've tried disabling all services and startup items in msconfig and it still doesn't work.

I was hoping that other Skylake owners would be able to test this beta version just to see if it works for them.

The tabs in question are the CPU SPEED and CPU TURBO tabs within the PERFORMANCE tab. The software is perfectly safe and some people might find it useful, once the fully working version has been released.

Whether it does or doesn't work on your machine could you let me know with details of your motherboard and any software on there that might poll the CPU core frequencies?
post #66 of 11368
Thread Starter 
Congrats to shredzy for being our new OC leader with the highest overclock in the chart! :thumb: 

 

At work all day today, burning midnight fuel to make some changes to the guide. Rest assured I'm listening to podcasts and trying to familiarize myself with Skylake, getting all the information I can...

 

Updates to the guide per changelist:

Warning: Spoiler! (Click to show)
8/23/2015
Overhauled the section on base clock changes. The original explanations were crap.
Changes to the headers in the overclock guide section to make them stand out more. Easier to read and looks better.
Changed the charting form to reflect more Skylake-specific settings. Changed styling to make it easier to read.
Removed all mention of "ring bus" or "uncore". The standard term is "cache", and so it will referred to as such.
Altered IPC comparison chart.
Fixed typo at intro.
 
8/22/2015
Changed the chart to reflect more Skylake-specific settings like BLCK.

 

Quote:

Originally Posted by JackCY View Post

Stock clock is 4GHz for 6700K, so yeah that's about right you can add on average about 500MHz which is +12.5%.
In fact in lots of the reviews I've seen on launch the OC was around 4.5 on average. But as someone pointed out here already, don't rely on reviews, the people sometimes don't know what they are doing. Sad but it's how it turned out, the enthusiasts are mostly gone from writing reviews and reviews well it has turned more to news and advertising honestly, selling and making money than providing technically difficult reviews, doing things you can't do without expensive equipment and tons of time. Some still do, sure but it has become rare.
If someone is expecting to do a +1GHz OC, get a lower clocked i5, those can do it.
No I'm going to stay with DC, there is no reason to upgrade to SL from DC, HW, probably not even from IB unless it's limiting you. SL performance gain over DC is minimal but at least it can keep up unlike BW.

Read the undoc.txt for Prime95, I've posted some options above in a post that can change the code paths and disable CPU features, there are more tweaks in P95. It's all in the files, don't look for it in the primitive GUI.

BCLK from a technical POV should be less of a hindrance now for OC since it's once again separated and the peripherals have their own clock locked stable at 100MHz.

It's hard to find official info about SL, because Intel is so secretive about it and hasn't yet released much of it officially.
 

I guess time is money and it pays more to move on and write new articles instead of fiddling with your CPU longer.

 
Originally Posted by Deders View Post

I suggest people have a look at this review. It is the only one I've seen where they took the time to go beyond just adding voltage and increasing he multplier. The BCLK is involved too which affects the cache and as you will see, some benchmarks can benefit greatly from this, even outperforming the 8 core 16 thread i7 X5960.

http://www.overclock3d.net/reviews/cpu_mainboard/intel_skylake_i5_6600k_i7_6700k_1151_z170_review/6

I think one of the reasons they managed such a high BCLK is due to using the integrated graphics chip and having nothing in the PCIe slots.

What do you think about my overclocking guide thus far? I've updated the base clock overclocking section. Of course, still don't have a Skylake CPU to test. :p Never overclocked base clock either. Then again, when I wrote the Haswell guide I've never really overclocked anything, ever. Just have to work at it, I'm sure I'll get it down. Then I have to explain straitforwardly.

 

Warning: Spoiler! (Click to show)
 
Let's employ the simple but useful idea of changing one thing at a time. If you're overclocking your core clock, cache ratio, and GPU and testing by playing a video game, you have no idea which overclock crashed you. Write down settings and whether they work or not. Go up one multiplier at a time. The extra voltage required to jump each extra multiplier grows and grows, but still increase your voltage incrementally. It's normal for voltage under load to be higher than what you set in the UEFI, but it shouldn't be by much. If it's muuuuch higher, make sure you're not running adaptive voltage while doing a very harsh stress test like Prime95.
 

Quick Overclocking

1. Optional: Manually set your cache ratio and ram to stock. Hell, turn your GPU's overclock off.
2. All Skylake CPUs so far can hit 4.4ghz. Try 4.5ghz at ~1.35v. It should work and be stable. If not, apply 1.4v. Stable? Good.
3. Just go up a multiplier. Increase voltage if you crash during stress testing with our x264 test. Remember, recommended maximum voltage is 1.45v. Never run a stress test and leave without monitoring the temperatures for the first 5-10 seconds.
4. Eventually you will find the highest overclock you can hit without breaking 1.45v and this overclock will pass x264 test overnight. Another option is to try Prime95 v27.9, but v28.5 is overkill and masochistic.
 
(Our modified x264 stress test can be downloaded under the 'Stress Testing' spoiler, along with many other stress tests you might want to try.)
 
5. Decide if you want to tweak the base clock. The next section is all about that. If you don't want to do it, you can overclock your cache ratio now if you wish. Please only overclock the cache ratio after your core clock is done.
 

BLCK tweaking time! (Optional)

6. Now we tweak the base clock. Remember that base clock x multiplier = frequency in MHz and divide by 1,000 to get the frequency in gigahertz. Recall that multipliers can only be whole numbers. We can tweak base clock to get an overclock that is as if we used a multiplier with decimals. Why is this useful? Let's say you can reach 4.5GHz but not 4.6GHz. Maybe 4.55GHz will be stable for you. You still can't hit 4.6GHz, but at least you've gone above 4.5GHz. With the right combination of base clock and multiplier, we can reach it 4.55GHz. There are limits to what you can set as the base clock, but they can be pretty lax. Right now as an example let's keep it simple and close to 100 though.
 
So let's say we want to do just that: Apply a 4.55GHz core clock. Let's pick a number that's close to 100... say, 95. 95 multiplied by what whole number is close to 4550MHz? 48.
 
Old OC:
100 x 45 = 4.5GHz Core clock
100 x 40 = 4.0GHz Cache clock
 
Base clock set to 95:
95 x 45 = 4.275GHz Core clock
95 x 40 = 3.800GHz Cache clock
 
Base clock set to 95 and multipliers adjusted accordingly:
95 x 48 = 4.56GHz Core clock
95 x 42 = 3.99GHz Cache clock
 
If the above passes, we now have a stable 4.56GHz, which is more than 4.5GHz but less than 4.6GHz. Maybe we could aim for 4.57GHz now.
 
What if I wanted 4.55GHz EXACTLY? You could try a base clock of 130 and a core multiplier of 35, giving us 4.55GHz exactly.
 
 
Remember these important things:
1. The base clock affects your cache frequency. Let's say I set the base clock to 130 and core multiplier to 35. If I forgot to adjust my cache ratio, I would have 130 x 40 or 5.2GHz cache! That's insane and probably won't even let me boot. So make sure your cache multiplier is adjusted along with your core clock when you are tweaking base clock.
 
On top of this, let's not overclock both the cache and core clocks at the same time. Keep the cache to 4ghz or lower no matter what base clock you're using. You can come back for the cache multiplier later when your core clock is at it's maximum stable value, which means you're already done tweaking the base clock and core clock. Your core overclock should dictate the base clock. The cache is an afterthought because it barely affects performance.
 
Your PCIE settings can be affected slightly by BLCK changes as well, but I have no data on that right now.
 
2. The higher you go from 100 base clock, the harder it is to stabilize. Maybe 130 base clock with 35 core multiplier gives you 4.55GHz exactly. But maybe having 101 base clock and 45 core multiplier (4.545GHz) is close enough, and has a lower base clock and is more likely to be stable. You're doing a balancing act between having a low enough base clock to be stable and the highest core clock you can hold. Experiment. Patience pays off.
 
 
 

Optional Ram Overclocking:

Once both the core and cache ratio are set to stable and overclocked values you don't want to touch anymore, go ahead and overclock your ram. You now have more fine-grain jumps in frequencies to choose from. Don't forget that timings matter as well, and the "tighter" or the smaller the numbers are, the better. According to Asus, System Agent and VCCIO voltages can help stabilize a ram overclock. Try 1.3v/1.25v respectively. The ram itself could use some extra voltage. The default is 1.3v, let's bring that to 1.35v which is a safe amount.
 
Here are rough guidelines for figuring out how your ram is doing for those too lazy to benchmark:
 
Latency:
Ram can have lower latency or higher frequency. Generally for gaming purposes, lower latency is considered to be more important (unfortunately for you, DDR4 is generally worse in this regard than DDR3). To calculate latency, do 2000 x (Cas/Frequency). Lower is better.
 
Frequency:
On the other hand, a higher frequency is generally considered to be useful for video editing workloads which do sequential reads. These types of work favors higher frequency. To calculate how long these reads take we do 1000/Frequency. Lower is better.
 
Anandtech's Rough Ram Performance Formula:
Frequency/Cas = Performance Index
Whichever has a higher performance index is generally faster. If two sets are very close, the higher frequency kit wins.
 
Final Step:
8. Go back and see if your overclocks still function perfectly with less voltage. How low can you go? This is just fine tuning of your voltages.
 

 

Quote:
Originally Posted by shredzy View Post

Well think I'm all done with stability testing! Got my 8 hour realbench pass.

I'll post up my final settings when I finish working with my RAM.

4.6GHz (46x100)
4.0GHz Uncore
1.325 vcore (in bios), 1.328V load, 1.344 idle in CPU-Z
LLC on Level 5 (found to be the best)

Max temp was 77C on hottest core.

Took this screenshot just before the 8 hour realbench test completed.

 

Hello Shredzy! Thank you for your contribution! Would you mind filling out this form?

Username:
CPU Model:
Base Clock:
Core Multiplier:
Core Frequency:
Cache 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.
Cache Voltage:
Cooling Solution: If you are delidded, note it here. Please explicitly state if you are doing bare die or not.
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: What country? Please list the entire batch number if you can. You can find it on the box or on the CPU IHS.
Ram Speed: State the frequency and timings (3200 16-16-16-35, etc etc)
Ram Voltage:
Motherboard: Optional, but nice information to have.
LLC Setting: If you didn't change default, say AUTO
 
 
And finally, perhaps you will get a slightly higher OC with base clock! Have you considered trying that out? :thumb:

Edited by Darkwizzie - 8/23/15 at 1:58am
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Undelwalt (2017)
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Celapaleis (2013)
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Hard DriveHard DriveHard DriveCooling
Samsung 950 Pro 512gb (Undelwalt) WD Red 2tb (Pack Yak II) Seagate Expansion Drive 5tb (Phoenix Down II) 3x560mm HardwareLabs Nemesis GTX 
CoolingCoolingCoolingCooling
XPSC Raystorm Pro Watercool Heatkiller 1080ti Full Cover Waterblock EK XTOP Revo Dual D5 (Serial, PWM, v4) EK ZMT (1/2 - 3/4 ID OD) 
CoolingCoolingCoolingCooling
14xEK ACF (Compression Fittings) EK x4 250 (v2) Distilled Water + PT Nuke (Copper Sulphate) 24x140mm Silent Wings 3 
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Windows 10 Pro 64bit Catleap 27 Inch 2560x1440 IPS 60hz Display Coolermaster Storm Trigger (Brown Switches) EVGA P2 1000w 
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post #67 of 11368
[quote name="Darkwizzie" [/quote]

Probably best to remind people once they have found and noted the highest frequency/voltages etc for the CPU and Ram to set them back to default before slowly bringing the base clock up to see how the rest of the hardware copes, watching the CPU and Ram frequencies as some motherboards will increase them along with the BCLK.

My Asus Deluxe did with the first bios, with the 2nd it tried to keep the core and memory frequencies as lose to where you left them by automatically adjusting the multipliers/ratios.
post #68 of 11368
Well guys, I have finally completed my 6700K and memory overclock....was a long 4-5 days of tweaking/stress testing to find those sweet spots. Now to see how it all goes with everyday usage/gaming.

For Darkwizzle

Username: shredzy
CPU Model: i7 6700K
Base Clock: 100MHz
Core Multiplier: 46
Core Frequency: 4600MHz
Cache Frequency: 4000MHz
CPU VID: 1.325V
Vcore: With manual voltage set, 1.328V at load.
Cache Voltage: N/A with Skylake, Vcore is tied with Cache Voltage
Cooling Solution: Corsair H100i GTX
Stability Test: Realbench, 8 hours.
Batch Number: Malaysia (Purchased in Australia) L523B541
Ram Speed: XMP Profile - 2666MHz 16-18-18-35 2T
Ram Voltage: 1.20V
Motherboard: ASUS Maximus HERO VIII
LLC Setting: Level 5

UPDATED 24/08/2015

Also wanted to mention that I went through 3 different motherboards on this platform. First was a Asrock Fatal1ty Z170 Gaming K6+, second Gigabyte GA-Z170X-Gaming 7 and lastly ASUS Maximus HERO VIII. I have to give a BIG props to ASUS on their motherboards, I had ZERO problems with it and its UEFI is absolutely outstanding, its like they actually cared about their layout/design and features with this board, they really care about overclocking and getting the most out of your CPU. Was a real pleasure playing with this motherboard, I really recommend others to go with ASUS for their next builds, they have a permanent spot in my heart now. If you aren't planning to overclock, doesn't really matter what you go with.

I've tried 4.7GHz but it was taking quite abit more voltage to pass just a 15min Realbench stress test, was at 1.39V from what I remember just to get pass that point so I'd be thinking id need around 1.40V to get it stable. I've also got screenshots of my BIOS settings if anyone requests them.

Pics of my build if anyone is interested

X1Cx1Zb.jpg
Edited by shredzy - 8/24/15 at 2:37am
My System
(18 items)
 
  
CPUMotherboardGraphicsRAM
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Hard DriveHard DriveHard DriveCooling
Intel 520 Series 120GB SSD Vertex 4 256GB 3TB Seagate Barracuda 7200RPM NZXT Kraken X61 w/ 2x Noctua NF-A14 
OSMonitorPowerCase
Windows 10 Pro 64bit BenQ XL2730Z Corsair AX1200 Phanteks Enthoo Evolv ATX Tempered Glass 
AudioOther
Creative Sound Blaster ZxR + JDS Objective2 HiFiMAN HE-400 
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My System
(18 items)
 
  
CPUMotherboardGraphicsRAM
i7 6700K @ 4.6GHz (4.6 Cache) Asus Maximus VIII Hero EVGA GTX1080 FTW 16GB G.Skill Ripjaws V F4 3200MHz 16-16-16-36 (... 
Hard DriveHard DriveHard DriveCooling
Intel 520 Series 120GB SSD Vertex 4 256GB 3TB Seagate Barracuda 7200RPM NZXT Kraken X61 w/ 2x Noctua NF-A14 
OSMonitorPowerCase
Windows 10 Pro 64bit BenQ XL2730Z Corsair AX1200 Phanteks Enthoo Evolv ATX Tempered Glass 
AudioOther
Creative Sound Blaster ZxR + JDS Objective2 HiFiMAN HE-400 
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post #69 of 11368
I got almost the same results after overclocking smile.gif
Very good for 24/7 overclock.
post #70 of 11368
I'm an OC'ing novice but I can understand why Asus's UEFI has won awards. thumb.gif

Username: Phreec
CPU Model: 6700K (HT off)
Base Clock: 102
Core Multiplier: 47
Core Frequency: 4794 MHz
Cache Frequency: 4080 MHz
CPU VID: 1.375v (Adaptive)
Vcore: 1.390v (Prime95 v27.9)
Cache Voltage: -
Cooling Solution: Noctua NH-D15 in a well ventilated Define S
Stability Test: One 7 and another 10 hour session in Prime95 v27.9
Batch Number: L525B417 Made in Malaysia, purchased in Sweden.
Ram Speed: 2991MHz 15-17-17-35 (XMP 3000)
Ram Voltage: 1.355v
Motherboard: Asus Z170 Pro Gaming
LLC Setting: Auto

http://valid.x86.fr/yqphwv


Edited by Phreec - 8/23/15 at 1:51pm
    
CPUMotherboardGraphicsRAM
Intel i7 6700K @ 4.8 ASUS Z170 Pro Gaming GALAX / KFA2 GTX 980 Ti HOF 16GB Corsair LPX 3000Mhz CL15 DDR4 
Hard DriveHard DriveHard DriveHard Drive
SSD Samsung 850 EVO 500GB HDD HGST 4TB HDD WD 500GB HDD Samsung 500GB 
CoolingOSMonitorMonitor
Noctua NH-D15 Windows 10 Pro N BENQ XL2430T 144hz TN BENQ GW2250HM 60hz VA 
KeyboardPowerCaseMouse
Corsair Gaming K70 MX Red Chieftec Super Series 850W Fractal Design Define S Logitech G502 
Mouse PadAudioAudio
Zowie Swift Creative Sound Blaster Z Beyerdynamic DT 770 Pro 250 Ω (headset mod) 
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CPUMotherboardGraphicsRAM
Intel i7 6700K @ 4.8 ASUS Z170 Pro Gaming GALAX / KFA2 GTX 980 Ti HOF 16GB Corsair LPX 3000Mhz CL15 DDR4 
Hard DriveHard DriveHard DriveHard Drive
SSD Samsung 850 EVO 500GB HDD HGST 4TB HDD WD 500GB HDD Samsung 500GB 
CoolingOSMonitorMonitor
Noctua NH-D15 Windows 10 Pro N BENQ XL2430T 144hz TN BENQ GW2250HM 60hz VA 
KeyboardPowerCaseMouse
Corsair Gaming K70 MX Red Chieftec Super Series 850W Fractal Design Define S Logitech G502 
Mouse PadAudioAudio
Zowie Swift Creative Sound Blaster Z Beyerdynamic DT 770 Pro 250 Ω (headset mod) 
  hide details  
Reply
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