Strong thermal tape or epoxy?

Cyber-Mav

Cyber-Mav

Cyber-Mav

Soldato
Joined
30 Jul 2005
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Looking to mount some heatsinks to vram and the crappy thermal tape i got just wont stick and becomes a hazard if it falls off and goes into the fan or something.

Anyone recommend some strong thermal tape or paste?
 
Bubo said:
With those stickle brick looking ram sinks I left the thermal tape on them and put them in place as normal, then added a teeny tiny dab of silicone sealant at two opposite corners. *NOT* under the sink mind, it was just to bridge the sides/edge of the sink to the circuit board of the card once the sink was in place, so you get full contact of the sink to chip, and the ligament of sealant on the side will just hold it. It was like a really small dab of the stuff applied with a cocktail stick so it could easily be removed when you need to take the sinks off again. Once set the sink will not be able to fall off.
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doesnt silicone sealant melt off at relative low temps like 70c?
 
Pulseammo said:
No, you're correct, it wont do thermal transfer, but I thought you and @Bubo weren't talking about using it like that.

He seems to be recommending using the stock thermal tape to attach the ramsinks, and then using a dab of silicone on an outside edge to add extra mechanical support, which lead into talk of whether silicone could take the heat, hence I suggested RTV. So there is no RTV between the ramsink and the IC, only on an outside edge to help anchor it.
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i see, can use heatsink with regular thermal paste then use the sealant on the edges to bond heatsink to pcb. didnt think sealant like this would be reliable with heat but worth a try i guess. would hot glue gun work? not sure what temp the glue melts at, higher than 100c i would have thought?
 
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