Nvidia' s latest graphics driver is actually an update for the GeForce GTX 480 and GeForce GTX 470 cards.
This WHQL- certified update adds 4-way SLI support for GeForce GTX 480, installs NVIDIA PhysX System Software v9.10.0129(NVIDIA PhysX acceleration is available on all GeForce 8series, 9series, 100series,and 200series GPUs with a minimum of 256MB dedicated graphics memory and a
minimum of 32 processor cores) and also installs
the HD audio driver, version 220.127.116.11.
Read the release notes
for more information. For downloads, visit http://www.nvidia.com/Download/index.aspx?lang=en-us