for people that use PhysX on nVidia cards (note Supports NVIDIA PhysX acceleration on all GeForce 8-series, 9-series, 100-series, 200-series, 300-series, 400-series, 500-series, and 600-series GPUs with a minimum of 256MB dedicated graphics memory.)
that aren't SLi to primary GPU thats hooked to moniter, only your physX card is in slot and power connected and no other connections
stand alone
the current Nvidia driver 306.97 WHQL drivers
Installs PhysX System Software v9.12.0604. would need to uninstall PhysX and get v9.12.0613 version
after doing this i noticed better shading, faster frames, more eye candy on explosions