I have that processor, and other than an annoyingly low framerate (probably due to the fact that the processor is doing all the rendering) and the infamous white screen during combat bug, the game runs just fine. Frogboy is clearly mistaken. This game is designed to be able to be run on netbooks in cloth map mode, if Frogboy is blaming the Black edition Athlonx2 then perhaps he's simply looking for a scapegoat.
My OS, proc, and RAM are all very similar to yours (I have a flat 3gb) and other than things that should be fixed soon the game runs fine. I do however have an Nvidia video card, but it's only a 8800 GTS 320 so it's no beast by today's standards.