The original NVIDIA plan was to have the GeForce 7950 GX2 announced now with the ability to use two in a SLI configuration allowing Quad SLI (four GPUs) for the DIY retail market. The plans have changed though. There are some issues NVIDIA is running into with getting two GeForce 7950 GX2’s working with all motherboards. There are issues with compatibility stemming from the system BIOS on motherboards. Issues revolve around the fact that the GeForce 7950 GX2 has its own PCI-Express switch onboard and the motherboard BIOS’ issues with identifying it properly..



Link: HardOCP