Originally Posted by hajile
A friend said to me the reason the GTX 280 is (supposedly) not supporting 4x sli is because of the power draw (typical 15 amp circuits only allow approx 1000w psu because the NEC limits usage to 80% load). Could there be any truth to this? If so could someone with a psu larger than 1000 w use 4x (240 volt psu with approx 1600 watts are available)?
First of all, the 15amp limit on PSUs is only limited to PSUs with multiple rails, and even then, they usually go above that. There will be no quad-sli for NVidia because they just don't know how to implement it. For the 7950GX2 and the 9800GX2, it wasn't true quad-sli, it was nested SLI. The two cards worked together, but the 4 GPUs were paired. The power requirements will never hold back a company as big as NVidia from making video cards as power hungry as the GTX280.