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[Official] The Sandy Stable Club **Guides, Voltages, Temps & BIOS Templates** Inc SPREADSHEET - Page 278

post #2771 of 10701
Quote:
Originally Posted by munaim1 View Post
When you open prime blend your pressented with 4 options, small FFTS, Large FFTS, Blend test and Custom. You want to run blend for atleast 12hours for true stability, however, that duration is not needed when your 'finding' your overclock, first start of with 10/15mins between bios changes, then slowly that would go to around 30/60mins then when your close to stabalizing you run it for longer.

XMP is a memory profile that's built in to the RAM, so if you select XMP, it will by defauly select the timings and votlage for your RAM and you should still be able to alter the PCU settings. Run XMP and you will be fine with changing everything else.






Do what he said regarding PLL but don't jump straight to 1.31v gradually up the vcore as you increase the multi and again post your other settings.
Actually since my MSI board with crappy UEFI bios grossly over compensates the vcore, I started with 1.220 v set in bios manually. Along with it I had set pll voltage to 1.7 and i/o voltage to 1.04. Dram voltage was 1.504 as shown in bios so the delta b/w Vi/o and Vram was ~0.5. I had turbo disabled, EIST enabled and intel c state disabled. HT was on and spread spectrum was disabled (as it messes with my bclk). Ram was manually set to 1333 with loose timings intentionally as I wanted to first stabilize the CPU oc and then fine tune the ram. I gradually went upto 1.296v for the cpu but no luck. I played with the pll voltage b/w 1.6-1.8v.

What I am doing wrong? or is it that I have a crap CPU?

Temps were fine too (or so I think), during prime the hottest core was 72-73 C @ 4.5 and 1.296v
post #2772 of 10701
Quote:
Originally Posted by devvfata1ity View Post
Actually since my MSI board with crappy UEFI bios grossly over compensates the vcore, I started with 1.220 v set in bios manually. Along with it I had set pll voltage to 1.7 and i/o voltage to 1.04. Dram voltage was 1.504 as shown in bios so the delta b/w Vi/o and Vram was ~0.5. I had turbo disabled, EIST enabled and intel c state disabled. HT was on and spread spectrum was disabled (as it messes with my bclk). Ram was manually set to 1333 with loose timings intentionally as I wanted to first stabilize the CPU oc and then fine tune the ram. I gradually went upto 1.296v for the cpu but no luck. I played with the pll voltage b/w 1.6-1.8v.

What I am doing wrong? or is it that I have a crap CPU?

Temps were fine too (or so I think), during prime the hottest core was 72-73 C @ 4.5 and 1.296v
There is nothing wrong, some chips just require more voltage than others. Most 4.5Ghz overclocks require over 1.3v to be stable. Is 1.296v the highest you've tried? Take at look at the chart in page one to see what kind of voltage other people need for 4.5Ghz.
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post #2773 of 10701
^wow thanks for replying so quick . Actually yes I did try 1.32 vcore once but wasnt able to get stable under prime95. What do you suggest I do differently to get a stable 4.5ghz oc. I am not aiming for anything higher until I get water cooling. The chart has numbers which are frankly all over the place, and that is honestly to be expected. I see that people have got stable 4.5 @ 1.248v as well as @1.4 v!!! Not a very helpful range TBH
post #2774 of 10701
Quote:
Originally Posted by nezzarix View Post
Take at look at the chart in page one to see what kind of voltage other people need for 4.5Ghz.
Yeah, that chart is awesome and has a lot of great info.
munaim1 REALLY needs to be getting some rep for this thread and the work he has put in to it. It is an awesome resource for anyone wanting to oc the sandy bridge chips.

Quote:
Originally Posted by devvfata1ity View Post
I see that people have got stable 4.5 @ 1.248v as well as @1.4 v!!! Not a very helpful range TBH
Heh, true, but remember that all chips are different. Go for 1.35 and see if that's stable, and try dropping from there. I do a quick 20 minute run of the 1344 and 1792 fft's (the hardest on the cpu) to check for stability and if it passes that then a long prime run. In my experience running those fft's is a great and fast way to check. It's not foolproof, but a great indicator.
Edited by fuloran1 - 8/17/11 at 11:44am
post #2775 of 10701
Those low volts for the 4.5 are really really good. You have to take an average and work around that range I think. Those super low chips are special and the super high ones are average. Simple as that really. I think.
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post #2776 of 10701
^^Yeah I think I will try with 1.35v core and post back the results.

^yeah thats so true. But I am afraid that I might have got one of those super bum ones that dont oc well.

BTW what do you think is a safe voltage for a 24/7 oc using air cooling @ 4.5?
post #2777 of 10701
Wow at 4.5ghz 1.34 vcore in ibt my temp were at 72, with prime it just scratches 60c! Hmm thinking of doing 4.7 with those kind of temps. However I know I will
Need 1.43 vcore for that.


Also a question. When my vcore is set at 1.35 in bios but the highest it gets in windows is 1.34. Does this mean I am using 1.34 or is it 1.35?
Edited by doc2142 - 8/17/11 at 11:56am
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post #2778 of 10701
Quote:
Originally Posted by devvfata1ity View Post
^^Yeah I think I will try with 1.35v core and post back the results.

^yeah thats so true. But I am afraid that I might have got one of those super bum ones that dont oc well.

BTW what do you think is a safe voltage for a 24/7 oc using air cooling @ 4.5?
Oh yeah, totally fine. As long as your temps are good and the voltage is under 1.5 you shouldn't have any issues.

Quote:
Originally Posted by doc2142 View Post
Wow at 4.5ghz 1.34 vcore in ibt my temp were at 72, with prime it just scratches 60c! Hmm thinking of doing 4.7 with those kind of temps. However I know I will
Need 1.43 vcore for that.


Also a question. When my vcore is set at 1.35 in bios but the highest it gets in windows underlie is 1.34. Does this mean I am using 1.34 or is it 1.35?
You may be able to hit 4.7 under 1.4v, I did and I think my 4.5 oc was needing around 1.34. Concerning your second question, you may want to add .04 additional turbo voltage, but if you're stable I wouldn't worry about it. It's probably because of your LLC setting, what is that set to?
Edited by fuloran1 - 8/17/11 at 11:56am
post #2779 of 10701
I didn't mess
With any llc settings. I just set my ram correct timings raised voltage and multi.
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post #2780 of 10701
Quote:
Originally Posted by doc2142 View Post
I didn't mess
With any llc settings. I just set my ram correct timings raised voltage and multi.
Ok, then it's probably at 5, which means your voltage will drop (vdroop) under load, unless you are using offset voltage, are you using offset?
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