Well recently ive been having trouble with CoD4. In the past ive been running at the default cap of 91 FPS. It was always steady there. Recently it has been dropping. Now I seem to remain around 70 FPS and it even dips into the 30s and stays there for a time. The whole FPS is unstable and jumps wildly which makes it harder to play. I have no idea why it has changed and keeps decreasing. Ive reformatted my Hard drive but that seems to have only made it worse. Im running an 8800GTX. So it should rock this game. Any ideas?