Hey, so I'm having some performance issues with my setup:

AMD PHENOM II BLACK ED 1100T - Stock
8GB CORSAIR DOMINATOR RAM 1333 - Stock
WIN 7 64
SLI GTX 580's (2) - Stock
I'm using the latest Nvidia beta drivers 285.79, installed and tested once, reinstalled just to be sure.
Steam version of the game.
Ultra settings, everything to max, 1920x1080 no Vsync.

So, I'm getting terrible fps pretty inside and outside. The point of reference I'm gonna use though is right at the beggining of the game, after you've chosen your character's appearance etc, when your facing the executioner and the prissoner gets his head cut off. With ONE of my gpus I get 28-31 fps, with both my gpus I get 35 fps. Even worse though, I set everything to low settings, 1920x1080 and in same place, with the executioner, 52fps with SLI enabled.
If this is the game performing as intended, then damn, that svcks. If not then I'd really like some help with this issue. I'm also having no problems with any other games.

Thanks