I have a 3.2gig p4, 2 gig ram, a 256meg 6800 ultra.
I set everything to as low as they will go, 800x600 screen res.
I did everything in the sticky, I defragged my PC last night, I have nothing else running. I have verified the game files through steam, no virus no spyware. I have ran in DX7/8/8.1/9 all give the same. I work in IT support and i'm honestly at a loss as to what the problem is. One thing that confused me is that I get the same FPS on low settings and on high (everything max 1280x1024)
Aside from my moaning from what I have played I have loved! Good job!