Hello, Recently when I play Call Of Duty 4, my FPS go down. This didn't happen before. Before I had about 60FPS average, now when I start firing, my FPS can drop down to 10! I have 4GB of RAM, 2.00GHz CPU, and an XFX 8600GT XXX (overclocked edition) graphics card. Is there anything that could be slowing down my PC?? As I mentioned before, this is not related to my graphics card because this did not happen before. Are there any tweets that will increase my FPS in-game? Thank you!