Dual Display Video Card Can A Dual Video Card Setup (2 Pci Express Cards) Output A Quad-monitor Display?

Can a dual video card setup (2 pci express cards) output a quad-monitor display? - dual display video card

I think a quad-screen monitor and trade in real time .... Whether 2 workstation cards (ie ATI X1650 Pro) in SLI mode, four screens can be used or may be, to a map of the workstation as the FireMV 2400?