64 bit is not a hardware issue, not with the cpu. it's the os issue. winders doesn't have the drivers for sound, some video, networking, modems for 64 bit windows. the software companies will not fully be 64 bit until after next flavour of m$ cra$hware is released// and the full support not until after sp2, after all it's in beta testing until sp2. my neighbour has 64 bit machine and 64 bit winders, and has 25% of the devices on the system working. the video card is basic use only. so he can't use this as a game platform as intended.