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Overclocking i5 2500k

post #1 of 7
Thread Starter 
I have an i5 2500k on a baseline P8P67 motherboard being cooled by an H70 closed-loop, power is flowing through the modular Corsair 750W PSU (enthusiast series, not Professional Gold)

Currently my turbo multiplier is maxed at 46 and the BCLK is still at 100, giving me 4.6ghz. I'm entirely unaccustomed to the UEFI and I'm having ZERO luck pushing the mulitplier higher than 46. Anything higher stalls at the "Starting Windows" animation and results in a reboot, followed by a no-post. The system will post the next time it turns on, however. (still no boot)

The only settings I've tried manipulating are the Turbo Multiplier and the BIOS/OS toggle for the multiplier. Any links to a conclusive guide to sandybridge overclocking? My main goal is to push it to 5ghz, anything past that would be great though.

All help/info is greatly appreciated! Thanks.cheers.gif
post #2 of 7
Here:
http://www.overclock.net/intel-general/910467-ultimate-sandy-bridge-oc-guide-p67a.html
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post #3 of 7
Thread Starter 
I've been following the basics similarly to that link after reviewing it, still not able to boot into windows with a multiplier greater than 45 even after voltage increases and the like. Wondering if I need to update the "BIOS" to a new rev, not sure which to flash to.
post #4 of 7
Hmm... what voltages are you trying?

46 multiple could be the limit for your chip... a bios update might help. I think the multiplier caps can be worked around with a newer bios.
Edited by techheadtrevor - 2/1/11 at 11:00pm
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post #5 of 7
My 2500k capped at 46x until I got a new BIOS for my P8P67-M Pro. Now I'm at 48x. Looks like anything beyond that would require water cooling, as with LLC enabled my temps jump to 95C in seconds under IBT AVX.

Even when my multi was capped at 46 I was able to get to 4.74GHz by upping the BCLK to 103 though, so that's another option for you. The other way to go is to try a 47x multi with BCLK at 99 or 98.

Don't hold your breath for 5GHz though, most 2500k's can't get there.
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post #6 of 7
Quote:
Originally Posted by TriBeCa;12234089 
My 2500k capped at 46x until I got a new BIOS for my P8P67-M Pro. Now I'm at 48x. Looks like anything beyond that would require water cooling, as with LLC enabled my temps jump to 95C in seconds under IBT AVX.

Even when my multi was capped at 46 I was able to get to 4.74GHz by upping the BCLK to 103 though, so that's another option for you. The other way to go is to try a 47x multi with BCLK at 99 or 98.

Don't hold your breath for 5GHz though, most 2500k's can't get there.

95C?! What is your VID set to?

I barely hit 65C at 48x100 on my i5 2500K.


EDIT: I missed the AVX part. I haven't tried that yet.



OP: try enabling PLL Overvoltage, that should give you a few more multipliers to work with. If not, you're stuck with trying to raise the BCLK. If that doesn't work, then you may have found your chips max.
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post #7 of 7
Wow, even with AVX I don't break 70C at 4.8GHz on my 2600K.
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