OK so you might have guessed I don't run a high end PC, and only an AMD powered one as well. The question is would the game really benefit from the quad processor or would it be barely noticeable.
Although CPU benchmarks show a quad core running at 2.4Ghz (Phenom X4 9750) almost twice the score as a dual core at 3Ghz (Athlon 64x2 6000+) I actually wonder if the game would benefit? Certainly video appications and the like would benefit but if a game only really uses one core most of the time I am not so sure.
For graphics I use a Geforce 9600GT (512Mb) and have 4Gb of RAM (DDR2 376.7MHz) - Motherboard is a Gigabyte GA-MA-770-DS3 and the quad core mentioned is very near the top of the scale for CPU's supported.