The day after releasing the GeForce 182.50 WHQL drivers, NVIDIA has also released a GeForce BETA driver with version 185.66, for both Windows Vista and XP. New in Release 185.66: Adds support for the new GeForce GTX 275 GPU. Adds support for Ambient Occlusion – the newest NVIDIA Control Panel feature to offer enhanced 3D gaming realism exclusively to GeForce GPUs. (Vista Only) Adds support for CUDA 2.2 for improved performance in GPU Computing applications. See nvidia.com/cuda for more details. Accelerates performance in several 3D applications. The following are examples of improvements measured with Release 185 drivers vs. Release 182 drivers (results will vary depending on your GPU, system configuration, and game settings): - Up to 11% performance increase in Call of Duty: World at War - Up to 5% performance increase Company of Heroes: Opposing Fronts - Up to 22% performance increase 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 45% performance increase in Mirror’s Edge with antialiasing enabled Supports GeForce Plus Power Pack #3. Download these FREE PhysX and CUDA applications now! Numerous bug fixes. Refer to the release documentation notes. DOWNLOAD: GeForce 185.66 BETA for Windows XP 32-bit | Windows XP 64-bit | Windows Vista 32-bit | Windows Vista 64-bit UPDATE: The day following the release of the 185.65 BETA drivers this article originally covered, NVIDIA removed the driver links and updated the BETA to 185.66, this article has therefore been updated accordingly.