Yes Zentman, have heard of the quad card. I have never used it though. Yes, with 2 dual cards I have essentially 1 big screen with the ability to drag and move among all 4. I have used 2 Matrox cards so they will not conflict. One time had a dual Radeon and dual Matrox on the same system and had to install them in a certain order for them to operate correctly. You can go to the Matrox site for info on their cards.