I've less 20 FPS (average) running OFF, with the same graphic settings, in Win XP than I've in Win7.
I've notice this since a couple of drivers versions ago. It's the reason why I play in Win7.
With the newest drivers release (9.11) I decide to give it a try again. Unfortunately nothing is changed. I reduced the stuttering I was having by deactivating Force Feedback, but the FPS remain low compared with Win7.
I could suspect that something is wrong with my XP installation, but with other games, I don't have this huge difference, only in OFF.
The only difference is that I'm using ATI Tray Tools in Win7 and CCC in XP. But less 20 FPS it's too much...
Has anybody with ATI cards is feeling the same "falling" performance?