I had a X2 before, was running fine with it. It's very heavy on the GPU though - so if the CPU can't supply the GPU with data, you would have to upgrade that too

Running AMD Quad Core now with 1 core running at around 60 - 80%, 1 core at around 20 - 40% and the rest being rather idle around 5-20%. The game is not well coded so it's not taking advantage of all the cores ...
Bottom line: you should be fine with a X2 though the GFX could need an upgrade
