Slevikch

Hey all, Whenever I change the settings in game from Low to Very High, my FPS remains in the same 34-40 region, sometimes dips in the 20s but the change in graphic quality is minimal. So, I'm assuming that my FPS issue is processor related. Currently I'm using an AMD Phenom 955BE (3.2Ghz x4) and have no FPS issues with other games. Are there any small fixes or specific options that could be disabled to improve this? Thanks