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Reapplying TIM

post #1 of 10
Thread Starter 
Decided to reapply TIM on my Sapphire 7870 to lose a few extra degrees and because I was bored. rolleyes.gif Well my plan backfired and I'm now reaching way hotter temperatures than before. I reseated the cooler twice thus far and still the same result. I'm using AS5 and the pea method. I did notice that the surface of the heatsink was very rough, even saw a small nick. Should I keep retrying or ditch the AS5 and use a different TIM?
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post #2 of 10
Are you giving it a good clean with some isopropyl alcohol , this is an essential step to ensure any of the old possibly dried up tim is all cleaned away. If so remember when applying the TIM that the smallest amount possible should be used as you want an extremely thin covering on the gpu to allow for maximum heat transfer. As you probably already know a small pea sized amount will suffice. thumb.gif
Edited by BeardedJesus - 12/5/12 at 4:32pm
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post #3 of 10
how much higher is way higher? It is most likely it is not making good contact. make sure that the cooler was re attached properly, it may not be screwed down properly. it is not the as5 that is causing such a drastic increase in temps.
post #4 of 10
Thread Starter 
I use 91% iso each time I reapply to clean the surface.

I recently played BF3 and noticed my temps reached peak 80C. Fan RPM was up as well. I usually peak around 70 with fan speed never going above 50%. Figured it was a bad seat, so I redid it and same results. Never switched TIM on a GPU before, but I know it shouldn't be this high even before the AS5 cures.
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post #5 of 10
pure acetone is better for removing old tim in my opinion, and instead of the pea method, put some on and spread it out with something like a credit card. you usually need to put more on a gpu than a cpu cause of the size of the chip. ive done multiple gpu re-tims with an avg temp drop of 5-25c, although i am using arctic silver ceramique 2
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post #6 of 10
also when putting the cooler back on the card, when you make contact with the chip, slightly twist back and forth a little to work it in. I prefer ceramique 2 cause its non conductive, doesnt need a cure time and IMO just does a better job
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post #7 of 10
Quote:
Originally Posted by K4IKEN View Post

I use 91% iso each time I reapply to clean the surface.
I recently played BF3 and noticed my temps reached peak 80C. Fan RPM was up as well. I usually peak around 70 with fan speed never going above 50%. Figured it was a bad seat, so I redid it and same results. Never switched TIM on a GPU before, but I know it shouldn't be this high even before the AS5 cures.

with as5, even after the curing time, the drop is about 1-2c.

what were the temps before?
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post #8 of 10
IMHO, I don't like the pea method, its all about spreading the TIM around carefully to the edges of the gpu die, and make sure you're cross-tightening the heatsink back on. Personally, I've always tightened the gpu heatsink a tiny bit of a turn tighter than 'hand-tight.'

Usually you'll see a degree or two celcius drop from stock TIM even before curing time on AS5.
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post #9 of 10
Thread Starter 
Temps before were in the 65-70C range while playing packed servers in BF3. I reverted to stock clocks and still having the same issues. I'm gonna try and pick up a different paste and see if that yield better results.

Need to start living by the 'if it aint broke, don't fix it' lifestyle.. but this is OCN, gotta get that last bit of performance possible. rolleyes.gif
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n O D E .
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post #10 of 10
I think with most of the people on this site that if we know we can squeeze more performance out then its 'broke' and we need to 'fix' it tongue.gif
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