Thank you popatim. I guess I was under the impression SLI was the joining factor for two cards to work in one system.
Followup question: does a second card need to be another Quadro card or could it be, lets say, a Matrox card or ATI?
Yes, I also thought the same thing. They should simplify thing w/the motherboards. If it's not broken do not fix it. ;-)... .