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I5-2500K overclock question

Last response: in Overclocking
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August 24, 2011 7:18:25 PM

I'm getting my numbers from CPUID and CPU-Z so I hope those are still considered 'valid.' I'm not a huge over clocker, but I'm running an i5-2500K on an Asus P8P67 Deluxe.

I changed the core frequency from 100mhz to 103mhz. In Windows 7 Ultimate x64 everything is fine, the cpu drops down to a 16x multiplier and things seem happy idle at 40c.

When I kick off Prime95 the multiplier goes back up to 36 (that's about stock turbo @ 3.7ghz, right?) the temp on all four cores jumps to ~94c. Clearly I don't leave it running like this for more than 15 or 20 seconds to see it stable out at that temp. I'm expecting the temp to hit maybe 80c but 94c seems ridiculous.

Yes - I have the stock cooler installed still. Does Intel ship this chip with a working "turbo" mode that will clearly burn the chip out in short order with the cooler they ship it with? Is this an easily fixable issue with an after-market air cooler? What temperature should I look at maintaining when overclocking this? I don't mind bumping up the voltages when and if I need to, but I'd like to be able to set the max multiplier at 42x or even 45x if I can keep this chip cool...
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August 25, 2011 12:00:24 AM

Get a good aftermarket cooler. Don't even attempt overclocking much with the stock. There is no need for you to up the BCLK from 100-103. Get a good cooler, turn the multiplier up to 4.3-4.5, and up the voltage a bit, say to 1.28-1.3

I'd keep it under 75 C on a long Prime 95 run if possible. I'm in a pretty cool room right now and my i7 2600K @ 4.5 ghz won't even hit 60 C with a Noctua cooler
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