I don't know too much about cooling , except from what I've seen on websites . I am purchasing an Athlon TBird 1 Ghz system with an ASUS A7V motherboard . I will not be doing any overclocking , but if I understood properly , cooling is still important . I mentioned this to the retailer , and was told that the case is 300 W and has 2 fans - it'll be enough . I asked the agent of the motherboards , and was told that the heatsink comes with the processor . I've noticed from some website photos that there is a combined fan/heat sink ( ? ) which sits on top of the actual processor . Is this the 2nd fan of the case that the retailer mentioned , or the heatsink the motherboard agent mentioned ? If so , should that be enough ? If neither of these 2 , then must I insist on getting such a fan/heatsink installed on the processor ? ( there will then be 3 fans ? ) .