stock case fan is very quiet. it hooked up to the speed control on the motherboard. since it puts out so few watts of heat it never gets hot enough to kick on all the way. so you have a fan running but its at like 500 rpm.

The following is my quiet rig. specs are 1.6 ghz intel atom, 40 gig laptop hd, 1 gig memory. laptop cd rom. I had most of the parts already. I had to buy cpu motherboard combo for 80 and a case with external brick power supply for 120. total cost for this project out of pocket was 200 usd. not only ...

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