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The ULTIMATE Sandy Bridge OC Guide + P67A-UD7 Performance Review - Page 55

post #541 of 713
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becuase it probably dropped even lower and you didn't notice it. Software voltage readings are very inaccurate.
    
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post #542 of 713
Great post! Thanks, got to 5.0ghz stable, should i push to 5.1?
@5ghz I'm at level 2, 1.52v, 1.89PLL, 100mhz BLCK, 70 degrees load.
    
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post #543 of 713
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i wouldn't push more, that is a lot of vcore. You can't drop the vcore anymore? if its for 24/7 id try to stay under 1.5v or at 1.5v of you have good cooling. You do have more room probably with those temps, but i only 10C about.
    
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post #544 of 713
Quote:
Originally Posted by Sin0822 View Post
Step #2 Step up the multiplier one by one until the system fails to boot\\
I am able to get my i5 2500k up to 4.6GHz and it boots fine but when I run the stress test it fails to run Prime95 or any stress test software. Is this my CPU been a "dud" or am I not overclocking properly.

EDIT: I would also like to note that at 4.3GHz I am at 1.3V, is that enough. It seems enough by the voltage/frequency chart.
Edited by mdemons12 - 7/30/11 at 1:53am
post #545 of 713
Quote:
Originally Posted by mdemons12 View Post
I am able to get my i5 2500k up to 4.6GHz and it boots fine but when I run the stress test it fails to run Prime95 or any stress test software. Is this my CPU been a "dud" or am I not overclocking properly.

EDIT: I would also like to note that at 4.3GHz I am at 1.3V, is that enough. It seems enough by the voltage/frequency chart.
Raise your vcore slightly and keep trying to pass stress testing. Just watch your vcore and temps as you raise vcore to see what you need to get stable. Also each chips different, the chart is a very wide range. Some people need more to be stable, some need far less, at the given frequencies.
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post #546 of 713
my 2600k running at 4.6 pass every stress test but get BSOD when surfing web, playing internet java games or watching movies, can anyone figure out why ?
post #547 of 713
Quote:
Originally Posted by Wek View Post
Raise your vcore slightly and keep trying to pass stress testing. Just watch your vcore and temps as you raise vcore to see what you need to get stable. Also each chips different, the chart is a very wide range. Some people need more to be stable, some need far less, at the given frequencies.
So the Vcore is just the main one that is in Advanced Voltage Settings or something.
post #548 of 713
Quote:
Originally Posted by xseanx View Post
my 2600k running at 4.6 pass every stress test but get BSOD when surfing web, playing internet java games or watching movies, can anyone figure out why ?
http://www.overclock.net/intel-cpus/...nna-cry-5.html

Quick read seems that power saving feature configuration may be something to tweak around.

Quote:
Originally Posted by mdemons12 View Post
So the Vcore is just the main one that is in Advanced Voltage Settings or something.
Yes, take another look at the first post. You'll see CPU vcore on the last 2 pictures. Work 1-2 notch increments so you can find the absolute minimum you need to be stable at a given frequency. If you feel the vcore or temps are too high at the frequency you wanted to run, lower the frequency then begin bumping vcore down until you are unstable, then go 1 above that and confirm to be stable there.

There's no "set" bump in vcore needed for each frequency. You may come across a point where you need a large vcore bump to get stable at say 4.6 vs 4.5, at which point it's up to you and your temps on what you want to do.
Edited by Wek - 7/31/11 at 6:59am
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post #549 of 713
Hey guys,

Ive recently gotten my PC updated with the following specs:
Z68X-UD7-B3
i7 2600k (Prolimatech Genesis heatsink, with 2x Coolmaster 120mm fans @ 2000 RPM)
Thermaltake Toughpower 1500w PSU
2x 1TB caviar black in raid 0 (sata3)
HD5970 and HD5870 in x-fire


I have been trying to overclock my CPU, I have read this guide thoroughly several times, however I cant for the life of me get it to go anything above 4.8 Ghz.. Also, I am using a massive amount of vcore and LL to get that clock speed, where I see others using much less voltage and LL settings on other motherboards.

Here is how my bios looks right now (I never use touch bios for OC, I use the normal bios, but this is good to show the settings that I have).













At the moment, I finally seem to have stabilized it at 4.8 ghz last night. Although I could run games on it before just fine, whenever I prime95'd it, it would crash after about 1 hour.

Although I have selected 1.395 volts for the vcore in bios, ET6 in windows shows it as 1.440 idle and drops down to 1.428-1.416 under load with LL 7, and my temps hit 75 as max (usually sit around 71-73). I have seen other people on different forums achieve 4.8 ghz with as little as 1.360 vcore and have temps in low to mid 60's with smaller coolers than the prolimatech genesis.

I have tried 4.9 ghz with 1.410 set in bios. In windows that shows as 1.452 volts idle, under load it drops to 1.440-1.428, but it just wouldnt survive prime 95 for more than a minute or two.

I have gone all the way up to 1.435v in bios with LL 8 and I still could not prime95 @ 5.0 ghz for more than 15 seconds.. and even within those 15 seconds my temps would rapidly increase into the high 70's and I have no doubt they would go 80+ if I wouldnt get a bluescreen. The code I usually get for the BSOD is 101, 124 and 3B, however I dont understand why such a massive jump from 1.395 up to 1.435 with higher LL would not be sufficient for as little as a +200 mhz gain.

Currently I am using Bios version F5. I know that F8 has been released, but ive heard it has problems with sata3 drive write/read speeds. I am considering upgrading to F7, but I am not sure if that is better or worse than F5.

Any ideas how I could bump my CPU up to 5ghz, have it stable and below 80 degrees?

Thanks for the help!
Edited by Flagg - 8/1/11 at 4:49am
post #550 of 713
Flagg, there's pretty much nothing you can do. Apparently your CPU just isn't good. You could possibly get it stable with lower vcore if you set QPI/VTT to 1.1-1.15.

Also, enable BCLK control because by default BCLK is 100.3 on gigabyte boards and it will require a lot more vcore than 100.0 at high multipliers.
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