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post #311 of 1151
Quote:
Originally Posted by munaim1 View Post
BIOS settings's look fine, it might not be the 'apps' that are using up the cpu but a service in the background like AV. I would suspect that if you was to install a fresh OS that light load would certainly disapear. It'll be a tedious task to find which background service that is using up the cpu, as I said before take a look at task manager and filter the window by cpu usage and see what service/process is using the cpu.

If you can post a screenie of task manager running. Thanks
The OS is only 1 month old and it is working so well that I don't want to mess with it. I just find it strange that with a fresh boot I get mostly 1.6GHz and low loads but once I load it up by downloading or opening a game it does not want to revert back to the initial 1.6 and lower loads even after stopping those activities. It just prefers to run mostly @ 4.4 without really needing to .

At any rate without making a minor change to correct the situation I will let it be. I still remember the Q9650/775 platform running at constant high speeds and voltages...never using EIST or the other energy saving selections and it was just fine to do so. I assume Sandy can take a bit higher speed and a bit lower volts on a 24/7 basis?
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post #312 of 1151
Thread Starter 
Quote:
Originally Posted by dennyb View Post
The OS is only 1 month old and it is working so well that I don't want to mess with it. I just find it strange that with a fresh boot I get mostly 1.6GHz and low loads but once I load it up by downloading or opening a game it does not want to revert back to the initial 1.6 and lower loads even after stopping those activities. It just prefers to run mostly @ 4.4 without really needing to .

At any rate without making a minor change to correct the situation I will let it be. I still remember the Q9650/775 platform running at constant high speeds and voltages...never using EIST or the other energy saving selections and it was just fine to do so. I assume Sandy can take a bit higher speed and a bit lower volts on a 24/7 basis?
According to Intel Database for Sandybridge the VID range goes up to 1.52v, the 775 socket was safe up to 1.475v VID range, but everyone said the max safe volt was over 1.5v for lga 775. So who knows, maybe its safe to go over 1.52v with SB.
post #313 of 1151
Im rather confused. I made a run for 12+ hours in prime 95 blend at 4.6 GHz and was folding on this rig since Sunday with no issues. I got back from a work trip and had to restart and I get the BIOS screen but no windows now. 0 settings were touched and it suddenly won't post at 4.6. Brought it back to 4.4 and its running like a champ again.

What am I missing here? I can't think of what caused this.

Edited by silvrr - 11/4/11 at 12:02pm
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post #314 of 1151
Wicked Thread Guys, bigs to the OP and for keeping good conversation going...

Im virginal at this game but having fun so far. I have read through this whole thread (and plenty more) and I have a few questions that I cannot find answers for, as well as some settings to criticize - if you'd be so kind...

Firstly, some questions...
- VRM - no one seems to talk about it much yet there seem to be various settings people go for. I understand that on say my Asus it's recommended (by forumers) to set at 350. Mine is at 300 and I'm stable, so any reason to change it, if so what benifits can I hope to expect?
- CPU PPL - I've read to stay below 1.8 unless doing suicide runs, 1.7 as standard and many people claiming that it's best to lower if possible. One guy even said that it's the most hazardous rail to overvolt. Am I correct in inferring that as vCore goes up, CPU PLL must go down, if not could someone please explain the relationship to me?
- Intel Adaptive Thermal - Some people seem to be disabling this, why?
-Safe Temps & Voltages - Many people seem to have many opinions on this so without starting a needless bickering session has anyone got any genuine, court case style evidence either way? All I can find on the Intel data sheets is a max VID of 1.5200v and a max of 74C at 95W TDP (from memory). Yet people talk about safe limits starting as low as 1.3, 1.35, 1.4, 1.45 ect ect So where is this confusion come from? Does this mean that 1.52v is a suicide limit and that only the brave and slightly stupid should chance it? Or does it mean that if you set up a render node OC'd to 5.2Ghz and have it working like a Trojan 24/7, you can expect to have to change your chip pretty soon? From what I gather in almost a year there have been no overvoltage problems, yet everyone seems to shy away from anything over 1.4, and from what I can gather it isn't based on any manufacturers' recommendation, it's just a lot of guessing and tutting... Also I have seen nothing from intel on this temp issue. Some claim anything under 98C is fine as no throttling will occur, yet the storage requirements for the chips are 125C max. Do these numbers come from documents we can all read or are they more estimated guesses? As far as I can see the Intel datasheets have a max operating Tcase of about 74C, so I am happy to stick to that as a rule of thumb, but if Intel support me going higher, I'd be happy to tempt fate I think...
BLCK Tweaking - I can't find it now but I read somewhere that BLCK on these boards is only for suicide runs and other stunts, something about how overclocking the BLCK will have an adverse effect on the Mobo... (trust me I am trying to find the link) Can anyone confirm or deny, possibly even expand on that? For some reason all the auto tuners on my board only want to fiddle with the BLCK, and there is a guide on BLCK Skewing to get RAM tuned in - is it serously red taped on these chips or what? I had this on 4.9something the other night with Bus at 103ish but after reading that I went straight back to XMP...
- OC Results - As much fun as I am having tinkering with all this I also have another PC to build and tune. At the moment I am Stable but hot at 4.7 - I can tinker more and see if i can drop the temps, I can pull back on the OC ect ect - but what real world difference will I see. I have been able to load windows up to 5.2Ghz so stability can always come (at the cost of heat) but realistically I'd need to upgrade my cooler if I wanted to go further. So is there a noticable difference in benchmarking between say 4.6-4.9Ghz? If so, is it worth the extra coin for a top line cooler or should I be happier with the savings on power?


Anyway, as I say I have Stabalised at 4.7GHz but with temps spiking to 80C it's a little too warm for my liking. I have come down 0.02v on the VCore but I don't seem to be able to drop further without bringing up the LLC, which kinda defeats the purpose. From what I gather by tuning it in the CPU on offset voltage I may be able to lower the thermals a bit but is there anything else I can do to help things? I have kept the VRM at 300 for this reason... I truelly feel like a noob asking but people are posting 4.7/4.8 on voltages well below 1.4v, so either my chip is a joke or I've missed something big here...

Here are my settings, dunno how to link them better...
Edited by D-Cup - 11/4/11 at 1:29pm
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post #315 of 1151
Hi,
I just built a new computer and starting to overclock slowing. I followed the instruction done by OP and I put the multiplier at 40. Is it normal if the core speed jumps between 1600 mhz (16 multiplier) and 4000 mhz (40 multiplier).

Is CPU PLL Overvoltage also Internal PLL Overvoltage? I couldnt find CPU PLL Overvoltage in bios.
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post #316 of 1151
Thread Starter 
D-CUP

To answer your questions:

VRM - The setting of 350 is just what most people recommend when going for high overclocks such as yours, Ill be honest im not 100% sure why we put it at 350, but its just what I was recommended and I have passed onto others.

CPU PLL - Stock is usually 1.8/1.9v, for some reason with sandy bridge your overclock can become more stable with a lower pll voltage (I know this myself due to hours of testing). The sweet spot is usually between 1.60-1.70. As for vcore going up, PLL must go down I dont think thats the case, basically PLl is like vcore in that you stress test and see how low you can get it before you become unstable, then keep it at that setting and increase multiplier/vcore accordingly.

Intel Adaptive Thermal - Not sure about this one.

Safe Temps & Voltages - Intel states as you correctly said max VID range is 1.52v. With the old lga 775 cpus (e8400, etc) the max VID Range was like 1.4v for instance, but people were told it was safe to run at 1.45v. So with SB VID range of 1.52v, you might assume that its safe to go over that.

Personally I just recommend to stay at around 1.4v, but if you want to go higher and have the cooling to match I wouldnt see a problem with it. The reason why I dont go higher is because it takes too much extra volt for just 100mhz increase, which I dont think is worth it. Max temps id say stay under 80C, but as you mentioned theres no solid evidence of people burning thier chips from going over a certain temp, or putting too much volt through it.

Put it this way, if my chip died at 1.5v, I would be asking and expecting Intel to RMA it due to thier specifications.

BLCK Tweaking - Again, this is just from recommendations from manufacturers and suppliers who state not to mess with BCLK. The only time you should see people changing this is when they go for very high overclocks, i.e using 103mhz and multiplier of say 56, because thier cpu might not be stable at 57x100mhz.

OC Results - The difference between 4.6ghz and 4.9ghz is obviously noticable in benchmarking and folding, but everyday use and under certain gaming conditions, it wont make much difference. Personally I would want a decent air cooler, just to keep it colder and for ever when I want to try increase my overclock I know I can.

Hope all this helps!

Quote:
Originally Posted by Crounching Tiger View Post
Hi,
I just built a new computer and starting to overclock slowing. I followed the instruction done by OP and I put the multiplier at 40. Is it normal if the core speed jumps between 1600 mhz (16 multiplier) and 4000 mhz (40 multiplier).

Is CPU PLL Overvoltage also Internal PLL Overvoltage? I couldnt find CPU PLL Overvoltage in bios.
The drop to 1.6ghz is Intel Speedstep or EIST kicking in, perfectly normal process that downclocks the CPU speed to save power and lower temperatures when idle.

Yes CPU PLL overvoltage is Internal PLL Overvoltage. The two differences is the PLL overvoltage, and PLL Voltage. One setting is disable/enable, the other should be like 1.80 etc.
post #317 of 1151
Yeah no worries, thanks very much for that... Yeah Id be much happier myself with something around 4.9+ but I got stung by Scan - Bought an Archon Cooler and they deleyed my order because they actually didnt have one in stock. They called me up and I agreed to switch it to a Nzxt cooler but when they sent me the updated invoice it had this ancient Noctua on it. I called and emailed to tell them I wasn't happy with that but they told me it was too late and that if I wanted to change it I would have to return it to Scan, get refunded and then they'd let me make a whole new purchase. I thought on a £5000+ order I might see some real customer service but I guess that died with chivalry....
Anyway as I say, many thanks for the tips - I'll keep plugging away and let you know how I get on, in the meantime I'll see what's on the cooler market...
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post #318 of 1151
Thread Starter 
Whatever you end up getting, I sing high praises for my prolimatech megahalems...max temps of 65C after days of folding at 1.41v ony my 2500k...cant beat that!
post #319 of 1151
Thanks for the thread! I've had my 2500k for a while and finally today I decided to overclock it. Your guide was great help to it. Curretly I am running with stock voltage and 4.0Ghz and so far it has worked like a charm. Maybe in near future I will try to go a bit higher. CPU temps are maxing around 60 with P95 and Intel BurnInTest.
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post #320 of 1151
Could somebody help me lower my CPU voltage? (Im hitting 98c with IBT, Prime95 gives me about 80+c) Im so confused with all these different voltages...

My settings now:
BCLK: 100
Ratio: 47x

LLC: Extreme
VRM: Manual: 350
Phase Control: Extreme
Duty Control: Extreme
CPU Current Capability: 140%

CPU Voltage: 1.430
DRAM Voltage: Auto
VCCSA Voltage: 0.92500
VCCIO Voltage: 1.20000
CPU PLL Voltage: 1.70000
PCH Voltage: 1.10000
CPU Spread Spectrum: Enabled
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