Team fortress 2 Graphics problem?

[Corey]

I recently bought a quadro fx 1300 graphics card for my dell optiplex gx620 full size tower running windows 7 os and a dual core pentium d 3.20 3.19. Anyway When I go to play team fortress 2 the graphics are all messed up and ive tried everything such as typing "-dxlevel 80" and many other dx levels. Also when I installed my graphics card i relized that they didnt have drivers for windows 7 so i installed vista 64 bit drivers. combat arms works fine but team fortress to have glitching graphics, no lag btw