GeForce 331.40 beta
The new GeForce 331.40 beta driver, is now available to download. An essential update for all GeForce GTX users jumping into the Battlefield 4 Beta, 331.40 beta ensures maximum performance and system stability in the shooter’s eagerly anticipated pre-release test.
Rounding out 331.40 beta is a whole host of profile updates, adding new SLI profiles, updating existing SLI profiles, adding new Ambient Occlusion profiles, and updating other profile elements for optimum game experiences:

Graphics
Implemented Horizon Based Ambient Occlusion plus (HBAO+) for DirectX 9 and DirectX 11 applications.

OpenGL
Added support for OpenG 4.4

NVIDIA SLI Technology-Added or updated the following profiles:
Assassin's Creed IV: Black Flag – Updated Profile
Batman: Arkham Origins – Updated SLI Profile
Battlefield 3 – Updated Surround Profile
Battlefield 4 – Updated Surround Profile, Added SLI Profile
Crisis – Added SLI Profile
Crysis 3 – Added AO Profile
Dirty Bomb – Added DX9 SLI Profile
Dying Light – Added DX11 SLI Profile
F1 2013 – Updated SLI Profile
FIFA 14 – Added SLI Profile, Added AO Profile
Natural Selection 2 – Added DX11 SLI Profile
Outlast – Added DX9 SLI Profile
Space Hulk – Updated Profile
Splinter Cell: Blacklist – Updated SLI Profile
State of Decay – Added DX9 SLI Profile
Watch Dogs – Added DX11 SLI Profile

Other Profile Updates
Crysis 3 - added AO profile
FIFA 14 - added O profile

Changes and Fixed Issues in Version 331.40
The following sections list the important changes and the most common issues resolved
since versions 327.23. This list is only a subset of the total number of changes made in this
driver version. The NVIDIA bug number is provided for reference.
Fixes Since Previous WHQL Driver Version 327.23
Windows Vista/Windows 7/Windows 8 Fixed Issues
[OpenGL][Solidworks Flow Simulation plugin]: Some features of the plugin do not work. [1368330]
[GeForce 6/7 Series]: GPU clock speed does not get higher than 405 MHz. [1356542]
[SLI][Splinter Cell Blacklist]: TXAA option is missing when SLI is enabled. [1353668]
[Surround]: Driver installation fails if NVIDIA Surround is enabled.[1353369]
[3D Vision][Rainbow Six: Raven Shield]: Stereoscopic 3D works for the game only if played in windowed mode. [1318923]
[Multi-GPU]: After clicking the Multi-GPU balloon message to open the NVIDIA Control Panel, pressing F1 does not open the Help. [1349589]
[Stereoscopic 3D]: After switching the refresh rate switched to 120 Hz using the
NVIDIA Control Panel and then running a 3D stereo application, the refresh rate automatically switches back to the previous refresh rate upon closing the 3D stereo app. [1343087]
[3D Surround], 3xGeForce 500/400 Series: When sending output to a fourth display outside of the GPU Surround group, the Surround resolution (3-wide) switches to a non-Surround resolution (single display). [736859]
[Quad SLI] [GeForce GTX 295]: “SLI connector is missing” balloon pops up even if the SLI bridge connector is attached.[919269]

Additional details:
PhysX-Systemsoftware PhysX_9.13.0725
HD-Audiotreiber 06/16/2013,1.3.26.4
GeForce Experience 8.3.14.1
DriverVer 09/27/2013, 9.18.13.3140

Download:
Windows XP-x32
http://tw.download.nvidia.com/Windo...tional-beta.exe
Windows XP-x64
http://tw.download.nvidia.com/Windo...tional-beta.exe
Windows Vista/7/8/8.1-x32
http://tw.download.nvidia.com/Windo...tional-beta.exe
Windows Vista/7/8/8.1-x64
http://tw.download.nvidia.com/Windo...tional-beta.exe


PS:以上內容轉自Guru3D，但官網上還沒看到任何的正式發佈網頁，我要先來試試了。