This is the second WHQL-certified driver from the R304 family of drivers (304.xx to 306.xx).
New in GeForce 306.81
New in R304 Drivers:
Additional Details
*Note: The following SLI features are only supported on Windows Vista, Windows 7, and Windows 8: GeForce GTX 600 series SLI, Quad SLI technology, 3-way SLI technology, Hybrid SLI, and SLI multi-monitor support.