Both the companies have released the newer drivers. Nvidia’s GeForce 331.65 claim to boost up to 19% performance for GeForce 400/ 500/ 600/ 700 series GPU for multiple games, in comparison with 327.23 WHQL Drivers. It was also stated that it can deliver the best possible gaming experience for BF4 and COD: Ghosts.
Other than that, it enabled GeForce ShadowPlay and GameStream, with an addition of 4K Surround. The download link (for 64bit OS) can be found here.
AMD rolled out a new BETA driver for Catalyst 13.11 and the newer driver assures crossfire scaling of 20% for BF4, and boost for Batman: Arkham Origins to up to 35% together with MSAA 8x enabling for the game. The BETA drivers can be found here.