Originally posted by: Bearing360
I believe (correct me if I am wrong) that 2 gpu's on 1 motherboard have to run in either sli or crossfire. With that said in order to enable SLI your gpu's have to be the same model number. since you have an 8800gts , you would need another 8800gts for that solution.
trust me... SLI + 2nd monitor is nothing but absolute headache.
The only way to do SLI + dual monitor is by using a third card. The second DVI port is diabled when you enable SLI. Now ive tried EVERYTHING when the 680i first came out to support dual monitor + SLI. I used 2 8800GTX(SLI) + 1 7900GT. The 7900GT couldnt play any movies, couldnt play games... basically its a dead monitor that i can only move icons and pull up IE explorer.
That means the only thing you can do on the second monitor would be browse though internet, pull up word.
The only way i was able to work around this was by getting an ATI card as a counter part. But i had to use 2 sets of drives. ATI and Nvidia.
Seems like SLI software still disables all Nvidia direct3d applications on the third card. So the second monitor is pointless in SLI system. Thats why i pulled my cards off SLI.
Anyhow your problem seems like your not enabling the second monitor in control panel. You need to extend your desktop onto the second monitor via control panel display options.