New GeForce Beta drivers are available. This is GeForce Forceware 275.27 for all GeForce 6, 7, 8, 9, 100, 200, 300, 400 and series 500 cards to date. We have a discussion thread open on this driver right here

 GeForce GTX 580:

• Up to 4% in Crysis 2
• Up to 5% in Civilization V with SLI
• Up to 9% in Portal 2
• Up to 13% in Bulletstorm with Antialiasing enabled
• Up to 15% in Batman: Arkham Asylum with PhysX High

GeForce GTX 560:

• Up to 6% in Crysis 2
• Up to 8% in Portal 2
• Up to 14% in Batman: Arkham Asylum with PhysX High
• Up to 15% in Bulletstorm with Antialiasing enabled

Increases gaming performance by up to 12% for dual-core CPUs in CPU-limited cases.

NVIDIA Update

• In Release 275, NVIDIA Update adds automatic SLI, multi-GPU, and antialiasing (AA) profile updates. These profile updates are automatically downloaded from NVIDIA and silently installed on your PC, keeping it up-to-the-minute with the latest game profiles. When you install a Release 270 or later GeForce driver from www.nvidia.com, you will be presented with the option to install NVIDIA Update. Click here to learn more about NVIDIA Update.

Desktop Scaling

• New NVIDIA Control Panel user interface for configuring desktop scaling, including new preview window.
• Now consistently available for all displays (including VGA and HDMI connections).
• New scaling override option for Windows 7 gaming.
• Improved desktop resizing user interface that guides the user to disable overscanning using their HDTV controls and also provides a fallback option to enable desktop resizing via the NVIDIA Control panel.
• NVIDIA desktop resizing now creates a custom, resized resolution with 1:1 pixel mapping and resizes standard resolutions for games that dont support custom resolutions.

NVIDIA 3D Vision

• With Release 275 drivers, the 3D Vision Controller driver is now included with all GPU driver installations. This driver package includes v275.22 3D Vision Controller driver. Users are no longer required to install a separate 3D Vision Controller driver or CD driver. For more information, please view this knowledgebase article for more information.
• 3D Vision Window Mode support. Please view this knowledgebase article for more information.
• Added support for 3D Vision Photo viewer to now work in Window Mode. When you have opened a 3D picture file check the View section for this new option.
• Improved 3D Vision IR emitter and 3D Vision glasses synchronization
• Adds support for new 3D Vision projectors: NEC NP-V300X series
• Added the following 3D Vision game profiles:
  • Age of Empires Online
  • Assassin's Creed Brotherhood
  • Battlefield Play4Free
  • Duke Nukem Forever
  • Dungeon Siege III
  • Super Street Fighter IV
  • World of Tanks
• Update the following 3D Vision game profiles
  • Portal 2 fixed water reflection problem and updated convergence setting to provide a better user experience
  • The Witcher 2 Improved 3D Vision compatibility for all in-game effects

We have a discussion thread open on this driver right here.