Whether I crank it up on maximum settings or play on lowest settings at the lowest resolution, the game is still crawling at 15-20 FPS. It's not the makeshift HD 4650 I'm using on my mom's computer; I can run Dishonored on lowest settings at 1024x768 with a reasonable framerate.
Anyone else had this problem? Is it just a badly optimized port? Any discernable fixes for it?