2500k Overclock

SockHaser

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Jan 12, 2011
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Okay, forgive me this is my first ever overclock so I have no idea what I'm doing :)

So I set my multi to 42 and am running at 4.2 ghz without any problem so far. Voltage is on auto and running prime95 the vcore is at 1.26v and temps are maxing out at about 70c (though two cores seem to be running about 10c hotter). So far everything seems okay. Is there anything else that needs to be done, I just want to make sure I don't wreak something.
 

MadScientist

Platinum Member
Jul 15, 2001
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Is this with the stock CPU heat sink? It's not uncommon to see a difference in temps between cores. My 2500K under load has a 6-7C difference between cores. A 10C difference is a bit high. Check that your heat sink is seated properly.
70C under load at 1.26V is ok if you are going to stay at 4.2Ghz, but if you want to go higher you will need an aftermarket heat sink or better case cooling.
 

Kenmitch

Diamond Member
Oct 10, 1999
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How did you load your cores to check your max temps? Depending on what you used then it's possible under certain circumstances you'll see even greater temps!

The diff between cores is kinda normal. Although yours does seem on the high side.

Here's 32hrs of data on my 2500K @4.5ghz running under water :)

Min temps(RealTemp)
Core 0 _8*C <---- Like I'm gonna believe this one
Core 1 24 *C
Core 2 26*C
Core 3 24 *C

Max Temps(RealTemp)
Core 0 60*C
Core 1 61*C
Core 2 62*C
Core 3 56*C

These temps are for normal everyday use and do include encoding video with Handbrake which does take advantage of all 4 cores.
 

SockHaser

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Jan 12, 2011
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Sorry, I'm using a 212+ as my cooler and the NZXT H2 as my case. I had a bit of trouble mounting the heatsink so that could be it as well. The temps for each core evened out a bit after awhile too. I'm guessing it just might be some uneven thermal compound, not sure if its worth trying to remount it or not.
 

Kenmitch

Diamond Member
Oct 10, 1999
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Sorry, I'm using a 212+ as my cooler and the NZXT H2 as my case. I had a bit of trouble mounting the heatsink so that could be it as well. The temps for each core evened out a bit after awhile too. I'm guessing it just might be some uneven thermal compound, not sure if its worth trying to remount it or not.

The Hyper 212+ isn't the easiest of installations. Once the compound settles for awhile double check the temps. Some variation is normal it seems. Not sure if it's worth a remount yet tho.

What did you use to check your temps under load? Something that'll hit the cores hard is best for worste case senario on max temps.
 

SockHaser

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Jan 12, 2011
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The Hyper 212+ isn't the easiest of installations. Once the compound settles for awhile double check the temps. Some variation is normal it seems. Not sure if it's worth a remount yet tho.

What did you use to check your temps under load? Something that'll hit the cores hard is best for worste case senario on max temps.

I used prime95 blend test and realtemp. Should I be using something else?
 

Rvenger

Elite Member <br> Super Moderator <br> Video Cards
Apr 6, 2004
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I used prime95 blend test and realtemp. Should I be using something else?


If you are planning on reapplying the thermal paste (which ever type you are using) Make sure you fill the crevaces in between the heatpipes before you put your lines of thermal paste on the CPU. It will make the thermal paste flow around the cpu heatspreader much better since there is less air space.

My temps barely hit 60c at full load running @ 4.3ghz and i am using a CM Hyper 212+ with a 2500k.
 

Kenmitch

Diamond Member
Oct 10, 1999
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I used prime95 blend test and realtemp. Should I be using something else

Prime is fine as long as your using current version of it. Intel Burn Test gets the heat up quicker tho. Both need to be used with newest versions as they seem to somewhat take advantage of the AVX extension set.
 

SockHaser

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Jan 12, 2011
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My temps barely hit 60c at full load running @ 4.3ghz and i am using a CM Hyper 212+ with a 2500k.

I think my case might be responsible for my higher temps. When I'm video encoding with the front door open my temps on the hottest core max at around 62c instead of a few degrees higher. I don't think it would be worth it to remount the heatsink for a couple of degrees.

So, as long as my system is running stable I should be good to go right?
 

Kenmitch

Diamond Member
Oct 10, 1999
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I think my case might be responsible for my higher temps. When I'm video encoding with the front door open my temps on the hottest core max at around 62c instead of a few degrees higher. I don't think it would be worth it to remount the heatsink for a couple of degrees.

So, as long as my system is running stable I should be good to go right?

Those temps are fine. A remount could make them better or worse even. Case airflow as well as ambient room temp will make temps fluctuate. If its stable your good to go.