CPU:AMD Phenom II X4 955 Black Edition
GPU:EVGA GTX 470
RAM:2x2gb Gskill DDR3 @1600mHz
Framerates are fine when I am by myself, but when I get into large firefights they drop very low, often between 20-40fps. I have tried lowering the graphics options but it didn't change anything (which makes sense since my card should be able to handle high). I have also monitored the CPU and the load on it rarely goes above 70%. I tried playing practice mode (with 24 bots) offline to see if it was an issue with the server, but I still had these poor rates. I don't know what's up. I just finished Mass Effect 2 and never had any issues like this, it was always really high framerates. Right now I am running a hard drive defragment but I doubt that will do anything. Also, TF2 is an exception in my security suite. I can even have my security suite go into "game mode", but it doesn't help.