Here is what I would like to do. Currently I have an old 8800 GT running a 22" and a 26" monitor in extended desktop mode. I am probably getting a new 470 GTX. If I get another 22" monitor, can I use the older 8800 GT to render the outer 22" monitors for miscellaneous use and use the 470 GTX to render the center 26" monitor for gaming?
I know I can't run in SLI cause not same cards and I think a single 470 GTX beats two 8800 GT in SLI. This way maybe the older card could take some of the workload off the newer card.