Just had to replace my HD, and decided to upgrade my graphics card from a Ti4200 to a evega 6800 at the same time. I picked up BF2 and when i play it, it has alot of the terrain and objects as just black space, or dosnt show them at all... what could be causing this?

Brothers in Arms plays just fine with everything on high. I tried low settings in BF2 and it still does it. Could it be a power supply problem? was using a 250W, tried a 300W, and still have the problem. Evidently these 6800's need alot of juice. Also tried upgrading to the new patch, no luck. And using the new nvidia drivers from the game.