It's not going so far as to expand support as far as AMD has with its CrossFireX multi-GPU technology, but NVIDIA has now at least taken one step in that direction. The company announced today that it's finally bringing SLI support to AMD platforms -- specifically, upcoming motherboards based on AMD's 990FX, 990X and 970 chipsets. Those will be offered by ASUS, Gigabyte, ASRock, and MSI initially, with additional manufacturers said to be coming on board "shortly." Hit up the source link below for NVIDIA's complete statement on the matter -- in which it also just so happens to point out that 93 percent of all multi-GPU systems in use today use SLI, according to Steam statistics.
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