I bought an AMD 1.4Ghz barebones system and I've heard people say how hot it can get. The system already comes with a heatsink/fan (I haven't gotten the system so I don't know the quality) but I was wondering if a case fan would be needed? Does a case fan help the cpu at all? I will have a 64meg video card, dvd, and cdrw in the system so should I get it, and if so which one is quiet and reasonable price? Thanks. 