I’m running a 2009 Mac Pro
2.66 Ghz Quad-Core Intel Xeon
12 GB Memory
2.5 GB EVGA Nvidia GTX 570 (Primary) (not modded)
512 MB Nvidia GT120 (Secondary for boot screen)
Win 7 Ultimate – Bootcamp
Nvidia 306.2 Beta drivers
Pretty much max settings and 50-60 fps.