3-Way SLI

Nvidia has also released a triple SLI setup for the nForce 700 series and the nForce 680i series motherboards, which only works on Windows Vista. The setup involves three high-end video cards connected with two MIO ports and a specially wired connector. The performance gain is said to be 2.8x improvement over a single GPU system, giving gamers approximately 60 frames per second at 2560×1600 screen resolution and 8x antialiasing.

3-way SLI is currently limited to the 680i, 780i and 790i chipsets.

Hybrid SLI

As its name implies, Hybrid SLI enables the SLI technology to be employed in a hybrid mode. Currently, there are two modes that it supports: GeForce Boost and HybridPower.

GeForce Boost

GeForce Boost is used on low-mid range motherboard with an on-board video based on Nvidia chipset. When you install a Nvidia video card, GeForce Boost can configure the on-board video to work together with the actual video card in SLI mode, thus improving the graphics performance. This mode is only supported by GeForce 8400GS and GeForce 8500 GT.

Hybrid Power

HybridPower is used on high end PC to control the number of video cards used at any point of time. When you are not playing games, HybridPower will turn off your video card and use the on-board video instead. Vice versa, when the full graphics processing power is required (when playing high end 3D games), the video card will be turned on and run at full power. Only GeForce 9800 GTX and GeForce 9800 GX2 support this mode.

Both HybridSLI modes only work in Windows Vista.