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Passive cooling or fanless

life24

Senior member
Hello,
Could you give me information about CPU with passive cooling or fanless?
How dissipate heat from CPU?
Thanks
 
Well, there's only four methods of heat transfer, and you just eliminated one (advection). The most interesting one that remains is convection. (There's conduction to the heat sink too, but that's always there with a heat sink. There's also phase change cooling, but that's within the heat sink.)

Basically, you want to:

1. Find a big heat sink.
2. Mount it so air can flow upwards through the heat sink. I assume your case is also fanless; otherwise why bother?

Sometimes you want to get a heat sink so big it barely fits in the case. Other times you want a heat sink so big it is the case!
 
I couldn't have said better.

Typically, go for a large internal CPU cooler like the Nofan CR-95C for 65W+ TDPs (and a mandatory mesh-laden case) or a heat sink case for less powerful processors.

51QDO09P0-L.jpg
 
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