I have a athlon xp 2600+, 512 Mb RAM, A 60gB wd hd and a 4gb wd hd motherboard asus a7n8x-x with a geforce fx5200 (fanless) and my case is a 4 bay with 350w font. My cooling is the font fan, a CUD-725 - 42.08cfm (air flux) and 4200 Rpm, and a font fan on the case, sucking air off the side of the processor. Well, if i use light applications, the pc works ok. when i use 3dsmax or any 3dgame, the cpu temp increases very much until the 70°c, when the MB turns the system off for protection. The only way i can play a 3d Game or Render a Scene in 3dsmax is with the air conditioning on (at a glacial temperature) or with a Fan turned on pointing directly to the cpu (i don't know if you can undestand it. It is not a pc fan. is a REAL FAN) .