Engineering Memes

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My GPU fans on the “Auto” setting (i.ibb.co)

submitted 7 months ago* (last edited 7 months ago) by [email protected] to c/engineeringmemes

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I know the max rated temperature for my GPU is 92°C, but that doesn’t mean it’s your target temperature!

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[–] [email protected] 2 points 7 months ago* (last edited 7 months ago) (1 children)

I don’t know of any modern paste that is electrically conductive

I wasn’t trying to imply that. When I said “frying the chip” I meant through bad thermal coupling.

contrary to the old belief, you can’t use too much.

You’re the first person to suggest that, and frankly, I find that counterintuitive. Everything isolates if it’s thick enough. However I’ll also look into that someday and see if there’s something to it. Thanks again.

[–] Betty_Boopie 2 points 7 months ago* (last edited 7 months ago)

Your correct that thickness plays a role in theremal transfer, but the paste and amount you use is not what determines that gap. Both laptop and desktop heatsinks are under quite a bit of pressure, more than enough to squish out extra paste. If you want to be extra sure you can spread a thin layer across the entire chip, but a dot or two usually works just fine. This video is on desktop coolers but mounting pressure should be similar.

If your laptop is over a couple years old I can almost guarantee there are dry spots on the chip currently. Laptops already run pretty hot and it's a double whammy for drying and pump out.