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I5 2500k 4.7Ghz Overclock

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August 12, 2011 12:09:26 AM

Hey guys just recently upgraded my rig, I will put up what my specs are and I have overclocked my new i5 2500k to 4.7ghz with the Vcore at 1.39V. I ram Prime95 for 15 minutes just to check for errors quick and ran fine. I also ran LinX for awhile no errors. Max temp I got with these tests was 66C. I am using a Hyper 212 Plus Cooler Master CPU cooler as well. Here are my additional computer Specs:

Intel Core i5 2500k @ 4.7Ghz w/ Cooler Master Hyper 212+
8GB G.Skill X Series (2x4GB)
(Upgrading my video card this weekend, now running my old HD 3650 256mb ddr2)
Gigabyte Z68X UD3H-B3
750W Kingwin MK Black Series
Cooler Master HAF 912 Gaming Case
2 extra case fans, one on front and back.

Once again my vcore is at 1.39V, 4.7Ghz, 47x multiplier, highest temp under full load during Prime95/LinX was 66C.

Cinebench I got a score of a 7.50.

http://oi56.tinypic.com/345lyc3.jpg

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August 12, 2011 2:18:57 AM

Looks good. You're within limits for both CPU voltage and temps, assuming you are using Core Temp or Real Temp or CPUID Hardware Monitor to get the individual core temps. If that's the Tcase temp, then you might be running too hot.

For a happy Sandy Bridge long-term overclock:
1. Keep peak Prime95 core temps below 75ºC
2. Keep the CPU voltage below 1.4v
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August 12, 2011 2:54:17 AM

Yeah the Vcore is 1.39V and the highest temp I just recorded using LinX Stress Testing for an hour was 66ºC.

I was using Real Temp for that test and I also use CoreTemp.

I am Idling below 30ºC and highest I get is like 66ºC @ 4.7Ghz.

The Vcore goes from 1.37v-1.4v but it looks really stable and is mostly under the 1.4v mark also the temp is pretty cool not even going near 70ºC after stress testing with LinX for awhile. Mid 60s being the highest.

So is that good for longterm, I think I'm done tweaking.


*Update* Ran LinX for 5 hours last night, no errors at 4.7Ghz, 1.39V.

http://imageshack.us/f/571/5hrslinx.jpg/


As you see on the left using Real Temp, highest it got was 65C all night.
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August 12, 2011 5:49:21 PM

Ran another 5 hour test of LinX today, CPU got no hotter then 63c during testing @4.7Ghz and 1.39V. I think I am officially stable at 4.7Ghz.
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December 14, 2011 6:29:31 PM

what strikes me is the seeming wide range of variation between these chips in terms of Vcore and temps to achieve the same overclock.

i'm also running my 2500K at 4.7Ghz (100x47), but at 1.31V only and LLC lvl 5. just survived its 10th hour on Prime blend test with 2nd core topping out at 70C but mostly sitting around the 67-68C range. the other cores are currently bouncing around between 58 and 66C.

not sure how accurate these readings are, given that one core is running up to 8C hotter than the others. makes me want to try lapping just to see if it makes a difference and evens out the temp readings between the cores.

similar, but not identical setup: Gigabyte GA-Z68XP-UD3 mobo, 4GBx2 G.Skill DDR3 1600

**EDIT this i forgot to point out: you're getting great temps for 1.39V, at least compared to me. not sure if i'm running a little hot for only 1.31V. curious if you're using LLC or not?
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