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Overclocking with i5 2500k and Asus P67 Pro voltages

post #1 of 9
Thread Starter 
I just put my new build together the other day. Its an intel i5 2500k, Asus P8P67 Pro, 8mb of 1600 ram, matched up with my ati 6970 I already had. Originally, what i wanted to do was put it at 4.3 Ghz and call it good... we all know how that goes. So last night I was OC'ing and it looks like this video card is still bottle necked because every time i bump up .1Ghz, I gain around 5 FPS on 3dmark06. The highest i went was 4.7 and hit a score of 30,233. I had no issues at this speed (although i only ran prime 95 for about 5 or 10 minutes before running 3dmark06 since it was getting late.

My question is though, my motherboard has a setting where it automatically compensates voltage based on your OC. I dont want to rely on this though, and i have my eyes set on 5 Ghz 24/7. What kinds of things should i be looking at for voltages? I bumped it back down to 4.3 for now and this is what i see running prime 95

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post #2 of 9
I run 4.5GHz @ ~1.28v. I have the CPU power allowance setting (forget what it's called) set at 110%, so if necessary the MoBo compensates by increasing voltage slightly (highest I've seen was 1.312) Temps are low 60's under load, low 30's/high 20's idle. Haven't had any stability problems.

Check out this thread: http://www.overclock.net/intel-mothe...therboard.html

Look at the bottom spreadsheet and you can see what people with P8P67 Pro are running for voltage with difference speeds.
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post #3 of 9
Thread Starter 
Cool, thanks for the good info. Just curious, i remember reading somewhere that they say 1.51v is the highest you would want to go. What are the potential risks of going too high?
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post #4 of 9
The potential risks of going too high on voltage is degrading or shortening the lifespan of your CPU. After a while, your previously stable overclock may need more and more voltage to maintain stability, or your CPU might just outright die. But I'm not sure that anyone knows right now how long your CPU will last if you run X volts for Y time.
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post #5 of 9
thats a good chip if you only need 1.28v for 4.5.

I hope I dont get a bad chip end of the month as some people on here are not getting to 4.5 with less then 1.45v
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post #6 of 9
Quote:
Originally Posted by nekromantik View Post
thats a good chip if you only need 1.28v for 4.5.

I hope I dont get a bad chip end of the month as some people on here are not getting to 4.5 with less then 1.45v
1.45v?!?! That's pretty high for 4.5GHz. 1.45V shouldn't do any "damage" to your CPU, but if all your settings are tuned right you should be able to do ~1.3v for 4.5GHz (anywhere from 1.25v - 1.38 wouldn't be surprising depending on your chip). Intel says the max Vcore for the 2500k should be 1.5V, however there are members on OCN that have pushed 1.65V or so (albeit they had great cooling and a great chip).
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post #7 of 9
Quote:
Originally Posted by Phantez View Post
Cool, thanks for the good info. Just curious, i remember reading somewhere that they say 1.51v is the highest you would want to go. What are the potential risks of going too high?
Like dkim said, there are a few risks associated with running too high voltage. Shortened lifespan, potential burnout, and decreased stability over time are the main problems.
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post #8 of 9
Quote:
Originally Posted by Zzari View Post
1.45v?!?! That's pretty high for 4.5GHz. 1.45V shouldn't do any "damage" to your CPU, but if all your settings are tuned right you should be able to do ~1.3v for 4.5GHz (anywhere from 1.25v - 1.38 wouldn't be surprising depending on your chip). Intel says the max Vcore for the 2500k should be 1.5V, however there are members on OCN that have pushed 1.65V or so (albeit they had great cooling and a great chip).
yeah I know its high so im hoping my chip aint a bad one ha ha
Im gettin it next month so pretty late in the game.
I hope im lucky and can do 4.5 at 1.28!!
will be using a Noctua D14.
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post #9 of 9
You should be fine. I think ~1.33v would be fair to call an "average," but a lot of people are doing ~1.3v so you shouldn't have any problems!
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Crucial M4 64GB, 1TB W.D. Black Samsung DVD-RW 22X Corsair H70 [Modded] Windows 7 Pro 64-Bit 
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