Large gap between core temps

S

silverJON

Weaksauce
Joined
Mar 1, 2007
Messages
77
coretemp.jpg


The gap between cores 0 and 1 wanders around between 10 degrees and 14 degrees. I think it's always Core #1 that's consistently higher. This is at full load on both cores (Folding@Home).

It's an Opteron 170 OCed from 2 to 2.96GHz, 1.54V (set to 1.525V), Abit uGuru reads 48 degrees full load.

I wonder if this has something to do with a badly applied IHS or something? I've got an EK water block on the CPU, and the IHS hasn't been lapped or removed.

Any ideas anyone? Thanks.
 
looks like a bad mount but there are other reason why that's happen
-imperfection in the HS or IHS
-bad contact between IHS and HS
-bad use of thermal compound
-improper OC
-etc
 
That is a big gap it temp difference....

Even worse than my Opty 175 had.... about 7-8c... before I removed the IHS.

Now that the IHS is removed, I have a max of 2-3c difference between the cores when fully loaded with Orthos.

Before I removed the IHS... I tried everything possible to get the temps more equal.... nothing helped.

After the IHS was removed.. I had to be careful with tightening sown the heatsink.... TT Big Typhoon.... It is held down by only 2 bolts..... I had to mess with the screw tightness while the computer was on in order to get the temps that close to each other.

Also... by removing the IHS.. I dropped the max temp with Orthos by about 15c. This is with it overclocked to 2.8Ghz.. before removing the IHS.. I had it at 2.75Ghz.

With it running at 2.75Ghz with the IHS removed.. there was more like a 17c drop.

Oh.. and before I removed the IHS.. I had already lapped both the base of the heatsink and the IHS. Lapping only got me about 3c.
 
Something is not right. I get only 2C difference.
 
you are running an Intel chip though.. right??? The Opterons are notorious for having different temperatures between the cores.... AMD was still using thermal goop for the IHS.

As far as I am aware.. Intel started using solder for the IHS.... much better chance of a better heat transfer/conection than with goop.. and it removes the possibility of being able to easily remove the IHS...

AMD has done the same with at least some of the high end AM2(FX) chips.
 
Hmm... I'm tempted by the idea of popping my IHS, although I'll try remounting first. I don't really see how it could have been a bad mount, though - I spent a while getting a perfect even, extremely thin layer of AS5 over the IHS. The bottom of the block is also a flat mirror finish. I could tighten the block further I suppose...

It's an EK block with a screw mount on each side.

(now at idle the temps have gone down to 30 and 40.)
 
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