ForceWare Release 80
Release Date: November 22, 2005
Adds support for GeForce 7800 GTX 512 and GeForce 6800 GS
Improved performance for Quake 4
Improved performance and compatibility for Call of Duty 2
Mixed vendor support for NVIDIA SLI.
TV-Out/HD-out support for NVIDIA SLI.
Added support for VSync on Direct3D games when running NVIDIA SLI.
Performance enhancements for dual-core CPUs.
PureVideo high definition MPEG-2 de-interlacing support.
Usability enhancements when connecting to an HDTV.
Microsoft® DirectX® 9.0c and OpenGL® 2.0 support
For a full list of fixed and known issues please view the Release Notes
Example: You can use a GeForce 7800 GTX from manufacturer ABC with a GeForce 7800 GTX from manufacturer XYZ.
Note: You must still use two graphics cards that have the same GPU. For example, a GeForce 7800 GT must be matched with another GeForce 7800 GT (not with a GeForce 7800 GTX or a GeForce 6800 Ultra). Mix and Match Graphics Cards with Different Input/Output Ports
Example: You can use a GeForce 6800 GT with Dual DVI & TV-out with a GeForce 6800 GT with Dual DVI & VIVO.
Mix and Match Graphics Cards with Different Clock Speeds
Example: You can use a higher clocked GeForce 6600 GT 550/525 with a standard clock GeForce 6600 GT 500/500.
Mix and Match Graphics Cards with Different Memory Sizes
Example: Using Coolbits, you can use a 128MB GeForce 6800 GT with a 256MB GeForce 6800 GT.
Courtesy of NVIDIA.com