What video card do you have? It has to support directx 11. I have 2x GTX 285's in sli and have no problem.
Nvidia Geforce GTX275 overclocked.Just bought it 5 months ago but I see it only lists directx 10 in its specs.My mistake.
[Edited by thegrube, 2/16/2010 2:17:18 PM]