Originally Posted by Arioch
This game is coded horribly. On my X800 Pro (FX-53 CPU) the game will run decent, but not great at 1600x1200 with everything turned on and the multisampling left at none. When I turn on the in-game multisampling to 4X the minimum framerates at some sections jump down into the teens. Seeing as a game more advanced like Far Cry runs a lot better than this it is inexcusable.
But like I posted earlier, I expected this from a console port.
I think it's a bit unrealistic to expect to play Thief at 1600x1200. Also, that resolution will not look much better than 1024x768 with 4x MS, especially considering the textures that are used by the game. Let us know what kind of frame rate you get with 1024 and 4x MS. I'm sure it will be more than acceptable.