Could anyone explain to me the advantages (if there are any) and disadvantages to a 2 video card setup when compared to a single dual-head video card? I know it would take up an extra PCI slot, but ...

Hey all,<BR><BR>I'm planning on replacing my proc/mb/ram on my current system. When I'm finished, I should end up with enough spare parts (ie. my current proc/ram/mb, nic, sound, etc) that I can just ...