6 gbs of ram here along with a 2gb HD 6970 and a Phenom II 965 x4 (3.4 ghz). Am able to run the game well at Ultra settings, vertical sync on at 1080p, provided anti-aliasing is off. Once or twice it dipped below 30 fps but usually it played at around 40 to 70 fps. Gotta say I like a game that's properly optimized for PC.