Not to be outdone by AMD, Nvidia has published a fresh beta driver of its own, offering up to 15% more performance on certain hardware and software setups as well as new and updated profiles.

Download GeForce 310.33 beta (release notes)
Desktop: Windows XP 32-bit | Windows XP 64-bit | Windows Vista/7/8 32-bit | Windows Vista/7/8 64-bit
Mobile: Windows Vista/7/8 32-bit | Windows Vista/7/8 64-bit

Compared to the GeForce 306.89 WHQL released earlier this month, the new 310.33 beta offers 2% to 7.5% more frames in Batman: Arkham City, Civilization V, Dirt 3, Dragon Age 2, The Chronicles of Riddick: Assault on Dark Athena, and The Elder Scrolls V: Skyrim when running on a GTX 660 with very high to maximum settings Nvidia touts similar gains on the GTX 680, which runs 3.2% to 10.9% better in many of the aforementioned titles as well as Deus Ex: Human Revolution, F1 2011 and StarCraft II. Check out the charts:

306.89 WHQL vs 310.33 beta (click for full size)

In addition to those performance enhancements, the 310.33 beta drivers pack new or improved ambient occlusion support for Cross Fire, Dragon Nest, Meng San Guo, Counter-Strike: Global Offensive, Darksiders 2, and MechWarrior Online. You'll also find new or updated SLI and 3D Vision profiles for many recently released and upcoming titles, including Assassin's Creed III, Call of Duty: Black Ops 2, Dishonored, FIFA 13, Hitman: Absolution, Need for Speed: Most Wanted XCOM: Enemy Unknown and more.

Today's update also carries a handful of bug fixes, including two that were specific to Windows 8: one caused a forced reboot on pre-release versions of the operating system, and another produced a "Hardware Test Failed" error when running the 3D Vision Setup Wizard using a Mitsubishi WD-6039 display. Vista and 7 fixes include an antialiasing bug in Diablo III, speed issues in Crysis 2 and Battlefield 3, quad-SLI surround problems with the GTX 690 in WoW, graphical distortion with flash videos and a few others.