I just installed today and had the same exact problem with the same exact video card. I fixed the problem by enabling "timeslice shadows". I know this is not intuitive because the FPS problems are present when shadows are completely disabled but it worked for me. Please let us know how this works for you.
I run at 1920x1200, Monitor refresh 75hz, FPS limit 75, all settings on "Extreme Mode" Vsync enabled. FPS was poor at these settings (and any other settings) until I enabled "timeslice shadows" and now my FPS is good.
Last edited by wesleyshaver; 26/02/11 05:12 AM.
