Two's Company, Four's a WOW! Sneak Preview of NVIDIA Quad GP

8) Thanks to the PCI Express (PCIe) interface, combining two graphics cards in an SLI configuration is easily achieved. Just plug two identical GeForce 6 or GeForce 7 cards into the motherboard, and connect them with the SLI bridge connector. The two cards will then split the 3D rendering load between them, which can result in a performance improvement of up to 70 percent in everyday life. Now that PCI Express motherboards are available with PCIe x32 - or, more correctly, two x16 slots - there are also some new and intriguing possibilities.

For more : *www.tomshardware.com/2005/12/14/sneak_preview_of_the_nvidia_quad_gpu_setup/