NVIDIA just released the first beta version of its Big Bang II driver, you can get the GeForce 180.42 beta driver over here. This driver adds SLI support on X58 based motherboards with SLI certification and has enhancements for Far Cry 2.
Beta driver for GeForce 200-series, 9-series, and 8800-series desktop GPUs (refer to the products supported tab for more detail).
Recommended for the best experience on Far Cry 2:
“Since we first began working on Far Cry 2 in early 2005, we have used GeForce GPU’s to develop the game and worked closely with NVIDIA’s excellent engineers. While Far Cry 2 represents an outstanding PC gaming experience for a wide range of systems, GeForce users can expect to enjoy the game quite literally ‘The Way It Was Meant To Be Played’.” - Louis-Pierre Pharand, Ubisoft, Far Cry 2 Producer
Enables NVIDIA SLI technology on SLI-certified Intel X58-based motherboards with the following GPUs: GeForce GTX 280, GeForce GTX 260, GeForce 9800 GX2, GeForce 9800 GTX+, and GeForce 9800 GTX.