Note:

For games that use SDK versions before 2.7.1 the PhysX Legacy Installer must also be installed. These are games that were released around the end of 2007 or earlier. (AGEIA titles) Examples of these games include CellFactor, Clive baker’s Jerich, Gears of War, Pirates of the Burning Sea, Switchball and Velvet Assassin.

- Changes & fixed issues in this release

Fixes a crash bug in Assassins Creed 4 Black Flag Havana when PhysX was set to high.

SUPPORTED PRODUCTS:

- Supports NVIDIA PhysX acceleration on all GeForce 9‑series, and 100‑series to 900‑series GPUs with a minimum of 256MB dedicated graphics memory. 

About PhysX System Software:

Usually, device functionality is ensured by its drivers, firmware, and/or BIOS packages, and the product can be used for its purpose once these files are installed. However, in order to expand functionality, as well as usability, owners can make use of various utilities.

Installing these packages is most of the times quite an easy process, and may or may not require a system reboot. Still they can be restricted to certain operating systems (or bit architectures), and existing Internet connection, or even specific components.

If all requirements are met, simply save the downloadable file (extract it if needed), run the available setup, and follow all instructions for a complete and successful installation.

However, since there are a huge number of device utilities provided by various developers and manufacturers, it would be a good idea to check any provided information regarding the installation steps, or just follow the ...