NVIDIA has published the GeForce 304.48 beta drivers, you can download them via this page. The full changelog can be viewed over here, it includes some pretty big performance gains:
New in R304 Drivers:
Performance Boost – Increases performance for GeForce 400/500/600 Series GPUs in several PC games vs. GeForce 301.42 WHQL-certified drivers. Results will vary depending on your GPU and system configuration:
GeForce GTX 680:
Up to 18% in Batman: Arkham City
Up to 15% in Dragon Age II
Up to 10% in S.T.A.L.K.E.R.: Call of Pripyat
Up to 60% in Total War: Shogun 2 (fixes performance issue with latest game patch)
GeForce GTX 560:
Up to 14% in Batman: Arkham City
Up to 5% in Battlefield 3 with SLI
Up to 4% in Dragon Age II
Up to 8% in The Witcher 2: Assassins of Kings with SLI
Up to 7% in Lost Planet 2
Fixes an intermittent vsync stuttering issue with GeForce GTX 600-series GPUs.
Fixes an issue where some manufacturer’s factory overclocked cards default to and run at lower clocks.
Fixes a performance issue in Total War: Shogun 2 with the latest game patch.
NVIDIA SLI Technology – Adds or updates the following SLI profiles:
Spec Ops: The Line
F1 2011 – updated profile
Final Fantasy XIV – updated profile
Saints Row: The Third – updated profile
NVIDIA 3D Vision – Adds or updates the following 3D Vision profiles:
Alan Wake's American Nightmare – rated Poor
Borderlands 2 – updated profile with new convergence settings
Depth Hunter – updated rating to 3D Vision Ready
Mass Effect 3 – updated in-game compatibility message and profile to be more compatible with community 3D mods
Max Payne 3 – updated rating to Excellent and updated in-game compatibility message to inform users to use DirectX 11, disable MSAA and use SSA0.
Street Fighter X Tekken – rated 3D Vision Ready
Tiger Woods PGA 12: The Masters – rated Good
Tribes: Ascend – rated Fair
The Walking Dead – rating Good
Other Profile Updates
Added NVIDIA Control Panel antialiasing support for Diablo III
Added NVIDIA Control Panel antialiasing support for L.A. Noire
Added NVIDIA Control Panel antialiasing support for Rayman Origins
Added NVIDIA Control Panel antialiasing support The Secret World
Added NVIDIA Control Panel ambient occlusion support for Star Wars: The Old Republic
Disabled FXAA for several Windows programs like Media Player and Movie Maker.
Surround settings now persisted after new driver overinstall.
Includes support for applications built using CUDA 5 Preview or earlier version of the CUDA Toolkit.