I think it maybe a mobo setting, I have no FPS issues with my FX8120 @4.4 GHZ & 3 way sli 470 OCed @ 800/1600, or my i7 3820 @4.5Ghz with 3 way sli 570 @820/1900, single player or multyplayer @ 5770*1080 maxed... Something is up, those GPU's should be smashing balls all over the place with that cpu.