I'm playing Mass Effect 2 and encountering a lot of lag - the game will stop for a second when I turn a corner or rotate the camera, and dialogue is getting cut off in game. Has anyone had the same problem? I'm playing it on Steam on 64 bit Windows 7, and my system can run Crysis on high settings fine, and I'm playing Bioshock 2 on high very smoothly so I don't think it has do with my PC under performing. Can anyone help?