Well, not to downplay anything, but I am running the game on a FX5700 and I am experiencing the very same issues that haunted KotOR1: am playing on 1600x1200 w/ all bells on 4x, plays a dream, almost too fast even - until there's any smoke or much lighting, then framerate plummets. Game crashes during cutscenes, freezes which then has my party running into walls and getting stuck there....lot of switching graphics options on and off which doesn't help continuity of gameplay etc.
So, just to say that not even Nvidia guarantees flawless results.....patch, anyone ?