I don’t get how dust can decrease the cooling performance. Does it slow down the fans? Does it prevent the radiator from, well, radiating away heat?
In: Physics
When rebuilding my pc last December I found this.
[Dust on radiator](http://imgur.com/gallery/aRwjmsh)
2 years without opening the case. Shows what dust does!!!
Technically both, but the second is the much more significant effect (unless you get such a solid dust mat in your cooling fins that air can literally not travel through the computer anymore – which happens quite a lot with laptops).
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