I got an nVidia SLI rig and a ATI Notebook, and im going with ATI for my next build, even my Notebook (HD4570) makes this game look better than any nVidia card ive seen so far.
Anyway keep in mind you can not use SoundHardware Acceleration and Effects with this game under Windows 7, has to be disabled in the Game and in Wndows, If not you get problems like Lower FPS or even Crashes.
A lot of people than usualy blame the Videocard or Drivers while its really DirectX DirectSound(3D) wich doesnt have Hardware Suport under Windows 7 and Vista.
Only OpenAL Sound still works like it always did, but with a lot of games like IL2 still using DirectX DirectSound(3D) sme people get problems.
(Might help for PE_Tigar)
More explained on it:
http://connect.creativelabs.com/open...%E2%84%A2.aspx
AKA_Tenn nice you try to explain somethin but im not sure if you understand what Dither is/does your self in this game.
Wikipedia wich i normaly wouldnt refer to does exactly explain and show (pictures of cat) what it is and does in this game:
http://en.wikipedia.org/wiki/Dither#...age_processing