Q6600 core temp differences

[jklc]

I just recently jumped into the realm of quad core and the irregular temperature readings that tend to come with it. I'm using Core Temp to read the temperature on a Q6600 and I noticed core 0 would always report the highest idle/load temps. I thought I'd try assigning cores 1-3 to do some work so they bumped up to 80-100% and temperatures rose to 55-60 degrees each. Core 0 hopped around 0-10% but the temp reading was 65 degrees.

Are the sensors on these CPUs just not placed very well or something? As you can imagine, running all 4 cores under load together puts core 0 way up into the mid 70s. I've got a thermalright jobbie on the way so I'm still using the stock hsf but I've reseated it a few times with no difference. I've checked but I don't think it's an issue with poor contact that lapping might solve.

I'm running it at 3.15Ghz (7x450) right now but I'll be aiming for more with the better heatsink. Just wondering if I should be trusting the rogue core 0 all the time with it's suspiciously higher temp vs the seemingly more sensible cores 1-3.

 

[a0004uk]

Its normal with quad cores for the temps to vary from core to core. On full load my q6600's cores vary by 5 - 7 degrees across all cores and thats on a lapped thermalright

 

[ffrr]

http://forums.overclockers.co.uk/showthread.php?t=17982623

 

[jklc]

I'll probably try lapping the IHS/heatsink some day but the fact that one core is supposedly running the hottest even though it's not the one doing any work is bugging me.

(edit: Hmm this isn't the oc/cooling forum isn't it?... I'll get me coat..)

 

[Addicted]

mine luckily do not vary that much, using Noctua U12P on a non-lapped cpu and im getting:
29 - 27 - 26 - 29
pretty acceptable temps tbh!

 

[marscay]

i doubt lapping will change it, it's normal especially for core 0 to be a little higher than the rest.

 

[jklc]

Got the beastly IFX-14 today, lapped it and stuck it in and all is good It seems when idling the different core temps fluctuate a lot but when primed at 100% they all converge at a nice 63 degrees.