The NVIDIA® GeForce® 7950 GX2 architecture allows two graphics processing units (GPUs) to be employed on a single graphics card for an ultimate gaming experience. The following motherboards have been tested and passed NVIDIA's compatibility testing requirements with the GeForce 7950 GX2 graphics card. Such test include motherboard System BIOS and electrical compatibility with the PCI-Express switch the design uses. If your motherboard is NOT listed it may not work with a GeForce 7950 based card. The "Motherboard Manufacturer" must release a System BIOS compatible with the GeForce 7950 GX2 reference design. Please contact your motherboard manufacturer for support on this matter.
http://www.nvidia.com/content/geforce_gx2_sbios/us.asp
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