Been playing around with the settings and have come to the conclusion that locking the frame rate at 40fps is the best experience for my gtx 570 it sits happily between 30 and 40. I've also dropped shadows to extreme to remove the annoying 10fps when shooting the ground. Hopefully we might gain a little performance when nvidia release a better suited set of drivers. Try sys_maxfps 40 let me know what you think also set motion blur to high.