this too hot under load :|

AMG

AMG

AMG

Soldato
Joined
18 Aug 2008
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lincs, spalding
hi as the name suggest its another "is my CPU getting too hot sort of thread"

anyway
I have managed to overclock my Q9550 to 3.8Ghz with rather low voltages (revieion E0) cpu is only on 1.2687 volts
my MB is only at 1.4NB (green)
DRAM @2.2volts OCZ specs the ram at this
FSB term :1.4(green)
and cpll at 1.5 (stock is 1.4)(green) looking at the BIOS

oh and I have GTL multipler set to x.67
my computer is runing on air I m not sure if its the heatsink (OCZ venetta2 or the fact that my case fans are rather weak for the size of the thing :O)

I m not getting instablitys or hangs it is stable, but under full hard load core temp 0 is shooting sky high :O all the other cores are staying in low 60c core 0 is going to 71-2c at which point I stop the test (using prime95 btw)

specs are in sig
 
It could be that the surface of your CPU and HFS arent surfacing completely flat, which is why you are getting a 10 degree core difference under prime.

Most duals/quads will have core0 as the hottest, but under load, they should all come to within a few degrees of each other.

Your options are to take off the heatsink and re-apply just incase you made a mistake first round, or lap the cpu, which voids the warrenty, but should give you lower temperatures and less variation between the cores.
 
yeah, looks like that again...oh btw I have to use the thermal paste as filler to fill out the gaps in my base of my heatsink (its the way it was designed)
 
yes, I got hold of another heatsink thermatpast application thing so I properly didn't get all the gaps are put too much on simpliey
 
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I have a sunbeam core cooler that just looks exactly the same as that, but i wouldnt advise 'filling' in any gaps, as the thermal paste (should it be applied thinly and correctly), will expand out to fill out any problems as best it can.

By adding extra paste in concentrated areas you've more than likely created a much more uneven surface of paste across the CPU, which is not going to be evenly dispersed so well.

My advice would be to look at the videos on youtube of how to lap a CPU. There is a really good two-parter that runs you through the whole process in just twenty minutes. I'd bet you'd see those cores even out...
 
yeah I royghtly now how to lap, its like asnding down car body work ready for sprying I persome ? lol

I think after work or tomoz I take the heatsink off and get rid of all the thermal paste than reapply than see how it goes from there.
 
Yeah, if things are still as bad, i'd say the only other option you have would be to lap.

It's a scary concept to consider, but practically its easier than building a PC to be honest. You're just carefully 'sanding' down any uneven surfaces from the surface of the CPU. Took me about an hour to do, and i did it pretty thoroughly. Pop yourself down to halfords and get yourself some wet and dry 400,600,800,1200 & 1500 lapping paper.

Whatever you do, dont put sanding paper on it :eek:
 
do I use the same "wet and dry" techniuqes like on car bodywork or don't or that will equal dead cpu. sand papar? tooo rough O_O
 
Let the weight of the CPU guide it across the wet and dry.

I followed this guide (and also part 2 by the side):

 
I had a big variation in core temps and lapping sorted that and yes it was simple took me about an hour as I was being extra careful ......... but it was worth the effort :)
 
If you're happy with the speed and it's stable then why worry?

I'd forget about lapping at this stage and just ignore it.:)
 
well two cores failed on prime95 on test 4 so I might need a bit more VTT voltage as I dare not incresse the FSB voltage
I took the heatsink off and revomoved the temral paste I still have quite a variation on the cores but temps are now under control core 0 only hit 71c than i put my hand on the heatsink and pushed on it and the temps droped and stay off, I did a fake fitting and took the heatsink off, to look at the termlpasteand found most off it hwas rough or on the heatsink so I persome its got good contact with the heatsink, and now i know why it jumped to 71c poor thing was also doing a anti spyware scan :O
 
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