crossfire 280x is way more than enough to run this game at max settings and with ultra textures installed as well, especially at only 1080p. the recommended 6GB of VRAM was an extreme exaggeration based on my own findings and the findings of many others. the game with ultra enabled uses as much vram as is available from gpu. i'm playing with an HD 7970GHz 3GB, max settings at 150% resolution (2880x1800) AND ultra textures installed/enabled. i am averaging 2.8GB of VRAM usage. at 1920x1200, my monitors native resolution, it drops to 2.4 - 2.5GB of VRAM on average. no vram related hitches or stuttering whatsoever. my only issue is getting crappy frame rates because i can't run crossfire.