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AS5 or thermal pads?

post #1 of 8
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Hey everyone, in my laptop there is a thermal pad over the GPU (in between the HSF and the GPU), should I replace it by a thin layer of AS5?
    
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post #2 of 8
It depends. I took apart my laptop once and found my setup for the chip was weird. It had the chip, a shim, then the cooler. Very little thermal material between them. I took it off, cleaned off what I could, and put AS5 between the cpu/shim/cooler. My point here is that the cpu cooler was not in direct contact with the chip. Your gpu might be the same way. If they used a pad, it might be making up for some space between the cooler and the gpu itself.

I would say try putting AS5 on there, as it will transfer heat better than a pad will. However, check to make sure the gpu cooler makes good contact. If it leaves a gap, it wont transfer any heat at all, and your gpu could risk getting damaged.
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post #3 of 8
/agree with the top poster...

Except you should make sure that there are some sort of mounts for the HSF. If its stuck on using the pad as an adhesive as well, then it will be dangerous to put AS5 in there as it may slip off and short circuit your laptop.
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post #4 of 8
I couldn't have said it better myself orion ..

Rep it up gentlemen.

The only point of thermal paste is to transfer heat from the cpu/gpu to heatsink /heatspreader. Not to mention fill the void spots where contact isn't made due to manufacturing defects " machining marks ". Which is where lapping comes in.
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post #5 of 8
I'd use arctic ceramique for gpus and mosfets. as5 is for cpus. Capacitance issue.
post #6 of 8
Yea, it might not be the best idea to put it the gpu.

Quote:
Not Electrically Conductive:
Arctic Silver 5 was formulated to conduct heat, not electricity.
(While much safer than electrically conductive silver and copper greases, Arctic Silver 5 should be kept away from electrical traces, pins, and leads. While it is not electrically conductive, the compound is very slightly capacitive and could potentially cause problems if it bridges two close-proximity electrical paths.)
http://www.arcticsilver.com/as5.htm

Ceramique would be the best choice.
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post #7 of 8
Or you could just go all the way and get some MX-2, which is completely non-conductive.
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post #8 of 8
Of course the factory pads that evga put on when assembling the card got a little torn up and not mention dirty. So I went out on a limb and decided to use AS Ceramic as it is not conductive, besides there is little info about pads vs paste, like which one are the best, and not a whole lot to choose from as far as products, and I like to read all about things especially since I am protecting my first dream rig, and my wife actually gave the green light to spend close to 4K. I have twin evga gtx260 and them temps were imo too hot for my taste, so I took one apart, and polished the hsf until it lookrdn like a brass mirror, then rubbed some asc onto the base with a latex glove until it had a super light hazy coating on it, Then I applied some to the perfectly cleaned gpu chip, a nice thin layer spread evenly with a credit card.
Now I used almost 6 whole tubes afterwards when I started applying dabs to each of the GPU RAM chips. Everywhere the gpu hsf made contact with any part on the cars. Now this card idles from 38-40 and it was around. I am now getting ready to take the nb/sb hsf off of my evga classified, I will either us as5, or ceramique of the nb but have heard the hsf is plastic on the sb and mosfets so was wondering if I should get pads, and if so which kind? 3M has some thermal tape and danger den has some as well. I really would preffer pads because the as ceramic was rather messy in the gpu when I repasted it. Any tip, or product recommendation would be appreciated greatly. Sorry for the long post! Thanks
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LeiLani X58 SS
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