I have built a modest system around an ASUS P4S800D-X motherboard. It works fine and is sufficient to my needs. I would, however like to utilize dual monitors for a number of reasons. OS is WinXP Pro SP3.
The problem I'm having is getting 2 cards to work together. I have several ATI PCI cards that all work as a lone installation, but stop working when the second card is installed. I do not currently have an AGP card to try in the mix......could that be the answer? Perhaps I need one AGP and one PCI???
Something like this AMC DVI-8700 DVI (Male) to VGA (Female) Adapter $3.50
One NewEgg customer review comment: "This turned my GeForce 7800GT card with 1 DVI and 1VGA port into a dual monitor setup for my new VGA flatscreens! I almost purchased a new graphics card with 2 VGA ports, but I got this adapter for a couple bucks instead."
You might be able to pick one of these adapters up at a local Radio Shack.