Trying to overclock my 2500k and it has been a nightmare

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mrupq

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Nov 5, 2014
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So I want to get at least 4.5GHZ. However everytime I tested in Prim95 in custom blend (changed Memory from 2000 to 5600 for my 8GBs or RAM) it always crashes after twenty minutes or so.

I also get very high voltage for the CPU starting out. I'm testing 4.4GHZ right now and it once flashed 1.492v in the beginning (but is now sitting at 1.376v).

From what I have read that voltage is still safe, but I doubt that I need that much vCore to get 4.4GHZ. Are there some things I can enable or disable in my Bios?

My mother board is a P8P67 LE.
 
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ABagOfFritos

ABagOfFritos

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Some processors can't be overclock the same as the next one. You might have a weak 2500k that just isn't going to get the OC you want.

As an example: I was able to get my 2500k stable at 4.9GHz and even mostly stable at 5.1GHz, but it was overvolting at 5.1 so I certainly wasn't going to keep it there. A buddy of mine wasn't able to get his past 4.4GHz no matter how much voltage he pushed or what else either of us tried to gain stability.

When overclocking, don't set a minimum requirement for what you want. All you can do is OC a little, verify stability, then OC a little more, verify again, rinse and repeat until you no longer have stability, then dial it back to the previous stable level and leave it there.
 
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mrupq

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Nov 5, 2014
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Is what I have now at 4.4GHZ at 1.492v okay? I mean it isn't for 24/7. It downclocks (as well as volts) when not in heavy use to regular settings. (1.6GHZ and around 1.00v).
 
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mrupq

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I can't set the vCore. I can only adjust the offset CPU voltage which sits at plus 0.070 right now.

My specs:

2500K CPU with Hyper 212+ Cooler
P8P67 LE Motherboard
ATI 6850 Video Card
8GB (4GB x 2) DDR3 1333MHZ RAM
 
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mrupq

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Nov 5, 2014
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So I've tested my CPU under Prime95 and I finally found settings where it passes for a long duration of time.

The results:

4.4GHZ
1.06 - 1.376V~1.384V (1.392V Peak)
65C 71C 72C 67C

4.5GHZ
.96 - 1.384V (1.400V Peak)
65C 73C 74C 69C

I think I'm going to go with 4.5GHZ. I will test it again with a lower CPU offset.
 
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4Ryan6

4Ryan6

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Apr 14, 2002
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For a 2500K run your memory at 1333mhz it will lower the heat that overclocking the memory controller generates when you do a raised multiplier overclock. (Lower heat = a higher possible overclock)

4.5ghz usually runs between 1.275v ~ 1.335v, it usually takes the higher of the numbers, if you are running an SLI or Crossfire setup. (but of course you have to test it for yourself and run the lowest voltage you can for a rock solid stability)

And here's some help for you.

http://www.tomshardware.com/forum/id-2012433/sandy-bridge-series-multiplier-overclocking.html

 
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4Ryan6

4Ryan6

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Using offset will do that you have to use fixed voltage to get more control over the voltage, in the BIOS you choose manual overclocking and set the CPU voltage manually.

You do have those options available to you in the BIOS I have a P8P67 M/B myself.

 
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