This is a WHQL-certified driver supporting GeForce 6, 7, 8, 9, 100, and 200-series desktop GPUs and ION GPUs.

New in Release 186.18

Numerous bug fixes. More information can be found in the release documentation.
Installs the new PhysX System Software version 9.09.0428.
Users without US English operating systems can select their language and download the International driver here.
New in Release 185/186 drivers:

Adds support for CUDA 2.2 for improved performance in GPU Computing applications. See CUDA for more details.
Expands GPU hardware acceleration for the NVIDIA Video Encoding library to GPUs with less than 32 cores. Applications using this library include CyberLink PowerDirector 7, Nero Move it 1.5, Loilo SuperLoiloScope MARS, and CyberLink MediaShow Espresso.
Accelerates performance in several 3D applications. The following are examples of improvements measured with Release 185/186 drivers vs. Release 182 drivers (results will vary depending on your GPU, system configuration, and game settings):
Up to 25% performance increase in The Chronicles of Riddick: Assault on Dark Athena
Up to 22% performance increase in Crysis: Warhead with antialiasing enabled
Up to 11% performance increase in Fallout 3 with antialiasing enabled
Up to 14% performance increase in Far Cry 2
Up to 30% performance increase in Half-Life 2 engine games with 3-way and 4-way SLI
Up to 45% performance increase in Mirror’s Edge with antialiasing enabled
Supports GeForce Plus Power Pack #3. Download these FREE PhysX and CUDA applications now!
Existing Support:

Supports single GPU and NVIDIA SLI technology* on DirectX 9 and OpenGL, including SLI support on SLI-certified Intel X58-based motherboards.
Includes full support for OpenGL 3.0.
Supports NVIDIA PhysX acceleration on a dedicated GeForce graphics card. Use one card for graphics and dedicate a different card for PhysX processing for game-changing physical effects. Learn more here.
Supports GPU overclocking and temperature monitoring by installing NVIDIA System Tools software.
*Note: The following SLI features are only supported on Windows Vista: Quad SLI technology using GeForce 9800 GX2 or GeForce GTX 295, 3-way SLI technology, Hybrid SLI, and SLI multi-monitor support.