Currently there is a Dell Optiplex GX745 that is setup with a radeon x1300 and has a dual monitor setup. I want to add 2 more monitors but instead of having both monitors add to the desktop, I want one to add to the desktop making it a 3 screen display and the 4th monitor to mirror the third display. Does anyone know if windows can handle this? Should I buy a second radeon card that is either pci-e 1x or pci, or can I just buy a pci-e x16 card a put it in the x1 slot? Or are those graphics not compatible with the slower slots? Any help is appreciated.