I have just downloaded it. It will Increases performance for GeForce 400/500/600 Series GPUs in several PC games vs. GeForce 301.42 WHQL-certified drivers.
For 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)


For 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

Copied from Nvidia Website. Link: http://www.nvidia.com/object/win8-wi...ql-driver.html
Happy downloading.