I am using a i7 920 that runs at 4.0 exactly. 12GB ddr3 memory on a 580 GTX. Full load is a max of 61C. Normally I will get 300-400 FPS in Team Fortress 2 with everything on high. Sounds nice, but I am still getting massive stutter when my FPS dips from 300 down to 220 I get lag so bad that I can't even really turn the mouse. Why am I getting fps lag only when it dips no matter how high my FPS is as soon as it dips I get massive lag my FPS has never dropped below 120. Did all the drivers older drivers newest ones beta ones no luck. I use to run a 295 GTX which never stuttered like this even when it hit below 100 FPS but this 580 just gets choppy even at 200.