you can run up to 10 with proper video card support. i have 2 duals and one quad is very nice
most matrox cards support dual g400, g450, etc . new parella supports 3 and g100 and g200 mms cards support 4 each you see below its all i use......2 pci quad cards and one agp dual and youll have all 10 monitors in one computer......a video wall
matrox is pretty much the originator of multi head cards most common card on the stock exchange..........
you could put in an agp and a pci doesnt matter how it talks to it as long as it does.
could be some cards are made in both formats....... i have 2 g400 cards laying around, one is agp one is pci..same card though
i meant more along does the card have to be the same model, as i have an AGP GeForce 2 in here, and theres a 4mb ATI (pci) card sitting in my 133mhz in the other room, which could be yanked out and put in here for dual monitor fun... if its possible... ?