+1 on that. I can run MANY games @ highest settings, including Far Cry3, and BF3 and get High Frame rates, but while running Metro With all effects maxed I dip @ certain points, Most noticeably while throwing Frags. I've even equipped Hybrid Phys-x , using an old 9800Gt , and it (SEEMS) to clear up, so it MAY very well be the Advanced Phys-x option in "Game Options". If you don't have Nvidia, then the Phys-x option is run through your CPU, which must add to frame Drops. I'm no expert, but either way, that Game IS visually Stunning, and I'm MORE than happy to deal with the Drops in performance, for such a Great game. Can Hardly wait for Last Light, or whatever the new Metro is Called. It look's Sick.