Hey guys. I've been having some issues with games (Mass Effect 2 and Call of Duty 4) jerking around a lot during gameplay. I've updated my graphics drivers and for the hell of it i updated turbo boost and my sound card drivers. I've also uninstalled a crapload of unnecessary software and disabled some services with no luck. I also noticed that Directx 11 is installed and I'm not completely convinced that my card supports it. My system specs are Dell Studio 1558 Windows 7 Home Premium 64-bit Intel Core i5 2.40 Ghz ATI Mobility Radeon HD 4570 What can I do to fix this problem?