AMD64 for life... my rig is slightly dated. will be rebuilding this summer.. I run everything fine and here is my specs:

AMD64 3200+
X800XL PCIe
2gb 2-3-3-5 Corsair
DFI LanParty Ultra D
XP120 CPU Cooler
160 SATA
Digidoc
120mm fan x3
LITE-ON DVD burner
LIAN LI Case w00t
MX1000 me love this
Dell 20.5inch widescreen LCD (me love this more)

Sorry, figured i would share my whole setup lol
Ill sell u some of the parts out of mine maybe so i can upgrade...