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Reapplied TIM 6950 -- Temps out of control now.

post #1 of 18
Thread Starter 
Decided to put some good quality TIM on my 6950 so I pulled the HSF, cleaned off the the tons of paste they put on, and put on some MX-2 I had laying around.

Boot up, run Furmark and temps are a good 40C more than they were. Terrific.

Pull HSF -- not enough TIM -- clean and reapply.

Boot up, run Furmark, temps are still terrible - +30C from stock.

Pull HSF -- good contact with the heatsink as the TIM is well spread but not too thick. Clean off MX-2 and put on some fresh NT-H1.

Boot up -- idle temps are about 5C lower but load temps are again out of control, +20 from stock or so. 97C and climbing fast.... It was 70ish and stable with the same fan profile. Fan is having to run at 100% to even keep it at 97.

What the hell is going on?

Just tried Furmark instead of GPUTool and it was at 100C at 100% fan speed. This is ridiculous. Never had an issue reapplying TIM.

Idle is 36C. Ambient is 65F. Furmark load is 100C+
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post #2 of 18
I dunno how it is with your 6950, but my 5850 has an X shaped bracket that holds the heatsink on. If you don't tighten all 4 screws equally, or crossthread one by accident, The cooler doesn't sit flat on the chip.
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post #3 of 18
Thread Starter 
Quote:
Originally Posted by imadude10 View Post
I dunno how it is with your 6950, but my 5850 has an X shaped bracket that holds the heatsink on. If you don't tighten all 4 screws equally, or crossthread one by accident, The cooler doesn't sit flat on the chip.
I do what I normally do. Tighten one, slightly, then tighten the one across from it slightly, and keep tightening gradually each opposing screw to keep it from favoring one side. I've reseated the HSF 7 times now...
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post #4 of 18
I have had the same issue with my video card ...
I said why not reapply some TIM on it.. replace it with MX-3 .. so I did and my temps rose ~5c at least ...
I regret ever doing it.
It did have a very thick, generous amount of TIM and I only applied a rather thin layer (a lot more than you would on a CPU but quite a bit less than what it had. This was the third time though. First, I only applied a small amount, like on a CPU; temps ware horrible. Then I applied more, temps ware still bad and then I applied a lot more and temps ware pretty decent ... ~+5C hotter than stock ).
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post #5 of 18
That's really weird. Perhaps a chance the temp sensor got all messed up? Probably not, but that's the only possible alternative I can think of.
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post #6 of 18
Maybe the stock stuff on the card is just better? I hear some cards have Shin Etsu as stock TIM.

I did it to an ASUS EAH 4870 1gb myself and the temp rose around 5C as well .

Thing is when I removed the cooler from my 4870, the amount of TIM on it was rather heavy, least ASUS was liberal with it, but as I cleaned it off, it was pretty much encrusted and had to use a bit more force with the rubbing alcohol and such to remove it. The ASUS 4870 itself isn't too old, I got it around late October of last year, so less than 3 months old (though I figure it's been sitting in newegg's warehouse for much longer).

I applied some Xigmatek PTI-G3606 on it mainly since it's non conductive at a decent amount.

I may try again sometime this weekend and apply less, I put on a rather hefty amount admittedly. I was even considering on trying to put the goop on my current 6950, but seeing as how my 4870 fared worse, I may just hold off on it instead.
Edited by yoshi245 - 1/28/11 at 5:38pm
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post #7 of 18
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Yah but 90+C playing BC2? Lord...if the stock stuff was 20C better than this I need to get a tube...I've tried putting a TON of the NT-H1 on with no better luck.
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post #8 of 18
i had this happen on my asus 5870 befor i went to water it took me a few trys to get good temps again what helped me was to spread it all out on the gpu or put alot of rice size dots around it.
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post #9 of 18
Quote:
Originally Posted by MGMG8GT View Post
Yah but 90+C playing BC2? Lord...if the stock stuff was 20C better than this I need to get a tube...I've tried putting a TON of the NT-H1 on with no better luck.
Well, maybe you should just get it RMA'ed? I figure you didn't void warranty, just don't have to tell them you replaced TIM or anything.
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post #10 of 18
I didn't have enough AS5 to finish putting my 5850 together so I risked using some crappy Cooler Master stuff I have from my Hyper 212+ on it and my load temps peak out at 72c with I believe 45% fan speed. You make sure that all the thermal pads were intact when you replaced the TIM?
    
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