I have a 2007 Mac Pro (dual quad 3.0ghz) and its video card (Radeon X1900) is driving two monitors now (19" and 22"). I would like to add another monitor and am looking for an inexpensive video card. It will be for email , Word docs, design palettes, no gaming. Any suggestions? Or, is there a way for the current card to drive more than two monitors?
I would check either otherworldcomputing.com or the marketplace. Neither option will be very inexpensive, though, since Mac Pro cards sell at a premium no matter what.