Unless its a Phenom or PhenomII go for the 64 bit. It works great
on my dual core AMD 64 graphics
literally come alive, and the speed is incredible.
I am currently downloading the 32-bit version for the phenom II as
the 64-bit has been quite unsatisfactory. In all fairness it might
just be that machine- its new and was untested previously so am
still experimenting with trying to get it to work properly.