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Pro tip: a customer at the shop told me my thermal paste jobs were "too neat," and he was right
I do mostly laptop repairs out of a small shop in Toledo. Been at it 11 years. Had a guy come in for a fan swap on his Dell, and while I had the heatsink off he looks over my shoulder and goes "you always spread it that thin?" I said yeah, pea sized dot, let the pressure do the work.
He laughed and told me he used to repair medical imaging gear, and those machines had torque specs on the heatsink screws because uneven pressure gave you hot spots. I never once used a torque driver on a laptop. Just cranked them down till they felt snug.
So I grabbed a cheap inch pound driver and pulled the temps on my next 6 rebuilds. Two of them dropped 4 to 6 degrees just from even screw pressure, no paste change. One of them was a gaming laptop that had been coming back every few months with a 95 degree complaint.
Now I keep the driver on the bench. Not saying everyone needs one, but if you are doing a lot of the same model, check what the screws are supposed to be at. Some service manuals have the numbers buried in the reassembly section.
Anybody else measure their screw torque on heatsinks, or am I the only nerd breaking out a driver on a Tuesday?
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roseb154h ago
Honestly 4 to 6 degrees sounds like it could just as easily be the fresh paste and a clean reseat doing the work, not the torque. If you had repasted anyway, how do you know the screws did it and not the new compound? And a pea sized dot on a laptop die is already standard practice, so him saying your spread was too thin kind of sounds like a guy who just likes to hear himself talk. Not saying torque specs are fake, they exist for a reason, but chasing inch pounds on a Tuesday for a fan swap feels like a lot of effort for maybe 5 degrees at best.
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