New Beta drivers available from Nvidia with a few nice performance increases:
http://www.geforce.com/whats-new/art...ivers-released

Performance Boost – Increases performance by up to 23% for GeForce 400/500/600 series GPUs in several PC games vs. GeForce 314.07 WHQL-certified drivers. Results will vary depending on your GPU and system configuration. Here is one example of measured gains:

GeForce GTX 680:
Up to 23% in Sniper Elite V2
Up to 9% in Sleeping Dogs

GeForce GTX 680 SLI:
Up to 22% in Sniper Elite V2
Up to 14% in Sleeping Dogs
Up to 9% in StarCraft II
Up to 5% in Call of Duty: Black Ops II
Up to 5% in Deus Ex: Human Revolution
Up to 5% in Just Cause 2
Up to 4% in The Elder Scrolls V: Skyrim
Up to 4% in Batman: Arkham City