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Large Difference in Core Temps Under Load

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OK Guys,
I redid the TIM using the single dot method (no pre-spreading). I elongated the dot slightly (1/4") in the direction of a visible rough area in the heat sink base. Curiously, this method does not seem to have changed the core temperature profile under load. After a day of break in, Old Prime95, after 5 minutes yields:
core1 - 82 deg,
core2 - 78 deg,
core3 - 67 deg, and
core4 - 73 deg.
Still a 15 deg difference between cores 1 and 3.

I can only speculate that core 3 must have near zero mfg defects and the others are probably average.

What do you guys think?
 
Im not sure about your theory (mfg defects), but I do know that the problem could be with the TIM spread below the IHS. You may be a good candidate for a delid, reapplication of TIM, and reapply IHS to see if things even out.
 
This is what I got on the Intel system I built for my friend, Prime 95 for 6 hours with all cores set to same multiplier. Set the multipliers to same setting.

6hours.jpg

Here is what it looks like :rofl:
DSCN0620.JPG
DSCN0623.JPG
 
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Oh well...I was just guessing from the GPU shroud thing. Cats always find the most awkward places to sit....and love boxes of all kinds

Look at the 2nd pic, I removed the shroud, my friend I built this for did not get a GPU, he wanted to use onboard GPU.
 
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