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Post by simnettpratt on Jun 2, 2020 22:26:19 GMT -5
So the house's A/C's been out this year because the thermostat died, new batteries didn't help this time. It's in the high eighties and low nineties here in Dallas, only going to get hotter, and my CPU was going to fry.
It's a crappy old AMD dual-core, and AMD says it's max temp is 70°C. It was running at 70 under load in the un-airconditioned heat, and spiking at 73, which will kill it. The ambient temperature in my computer room was 99°F when I turned my pc on this morning, and it just gets hotter in here all day. I decided to try some homemade thermal paste.
I mixed 80% toothpaste with 20% Vaseline and just tested it. Under the 70° load, it is now running at 63°, which it can do all day. Also, I'm getting a new thermostat on Thursday or Friday, so will have A/C, and won't fry myself.
The toothpaste thermal compound will only last a few months, but I can mix up another batch then. Very pleased it worked.
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Post by Legend Lover on Jun 3, 2020 13:25:01 GMT -5
That's pretty awesome. I wouldn't have a clue what to do with it or where to put it, but that's class.
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Post by zambini on Jun 4, 2020 11:19:00 GMT -5
simnettpratt That's some good thinking, it would have never occurred to me to try such a thing.
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Post by simnettpratt on Jun 4, 2020 16:14:12 GMT -5
You have to use toothpaste without the little rocks in it, and it will dry up in about twelve hours, so you add the 20% Vaseline and that keeps it moist and working for months. Just start mixing in the Vaseline and you can tell when it's greasy enough. Also, money for the thermostat arrived and I have A/C for the first time this year. It's fantastic.
With the A/C going now, the CPU hasn't gone over 48°C, when it was peaking at a deadly 73 before the toothpaste and cold air.
Now I can risk Flight Simulator, which pegs both cores at a constant 100% when it's running. Dave happy.
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Post by simnettpratt on Jun 4, 2020 16:17:14 GMT -5
"where to put it"
Remove the heat sink and fan from on top of the CPU, and spread the paste on the chip. It fills in the cracks between the metal surfaces and conducts the heat better than plain conduction and convection where the two sides don't mate perfectly.
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