If you're in vista or 7, right click the desktop and hit personalize, then go into display settings, and enable extended monitors. 1 per card if I remember right.
If you right click on my computer, hit manage, and go to device manager, does it show all of the cards under display adapters?
Alright, I'm running windows 7, this does not work for me and yes device manager shows all my video cards. I'm running 4 cards on one system.
I can get a card to show up if I physically plug a monitor into it, but the dummy plugs are not working they doe not see a monitor so I can use my video cards for mining.
Do you have any other suggestions?