I'm going to buy a retail PIII 1Gig flip-chip CPU. Does anyone know if the HS and fan come mounted on the CPU? If I wasn't going to OC, is the stock HS good enough to keep my CPU cool? If I later decide I want to OC is it just best to buy a good quality HS and fan right from the start and not have to mess with the associated tasks of having to replace it later? What should I do?