This is what I found:
The game uses PhysX, sadly there is nothing we can do about that part - please DELETE that .dll
(you placed in your System32) and never download a separate .dll from any site on the internet, believe me it'll save you in the long run.
If I am not mistaken, this is as simple as updating PhysX - which is at the link below.
NVIDIA PhysX Download (
NVIDIA DRIVERS 9.10.0513)
Before you ask, yes it works on ATI cards - the only difference is the ATI GPU doesn't do the processing for PhysX like a NVIDIA GPU would, it is sent to your CPU and since this game is REALLY CPU heavy, thats where a lot of the performance problems come from.