It all depends on your graphics card, which you didnt list. My setup has 4 screens. The middle screen runs at 800x600 at a resolution 60hz. The 15 inch and 2 side screens also run at 800x600 but at a resolution of 56hz. Thankfully my graphics card has the ability to use diffrent resolutions and also diffrent image sizes. So if I want the rear to be 640x480 and the front 800x600, I can. I am using embeded graphics, which is a ATI Radeon 1250 series. Maybe you should research what your card can do. If it cant do like stated above, try a ATI graphics card, but make sure it can support diffrent settings per port. Mine has a VGA port and a DVI-D port.