Each Core Temps

deomayo

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Hey guys first time overclocker here. I've overclocked my 4690k to 4.4 with 1.195 volts, ran a quick stress test (prime95) for about 30 mins and I noticed that one core was 8C lower than the other 3. 66C/74C/74C/73C max temps. Using NZXT CAM btw. Is this normal or should I reseat and re-apply thermal paste?

Thank you!

Using a Noctua NH-D14 as a cooler sorry!
 
Solution
Core temp variance is not abnormal, at least not in ALL cases. IF the temp of one of the cores was HIGHER than all the rest, then I'd be worried. As long as none of the core temps are in excess of specification, that one lower temp core I'd not be too worried about.

What version of Prime95 are you using to Stress test?
Core temp variance is not abnormal, at least not in ALL cases. IF the temp of one of the cores was HIGHER than all the rest, then I'd be worried. As long as none of the core temps are in excess of specification, that one lower temp core I'd not be too worried about.

What version of Prime95 are you using to Stress test?
 
Solution

deomayo

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ZENprime

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Yes that is normal saw it before on some intel forum can not remember exactly
The thing is intel design their processors with cores in line
Haswell_tech.jpg


The cores next to the system agent will see higher temps as they are in a busy area of the processor
while the core next to the graphics processor will see the least temps as it is in a not busy area
cores communicate with each other in a line and with the cache in a square route
You see that in i5/i7 as they have full 4 cores in a line
leading to cores being hotter than the other as much data cross them
 


I know you used Prime95, what I asked was, what VERSION. There are MANY versions of Prime 95 and only version 26.6 is currently recommended for determining thermal limits as other, newer versions run the AVX instructions on the processor which creates an unrealistic thermal situation. Try testing with Prime95 version 26.6 and only run Small FFT. Do not run Large FFT or Blend mode. Neither of those provides a steady state load which is what you require for determining true thermal conditions and limits.

Prime95 version 26.6: http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html

Also, make sure you run the correct bit version for your processor. For your CPU you want 64 bit.
 

deomayo

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