The question pretty much says it all.
I use an old 845GBV board ( to-date reliant upon the integrated graphics processor ). All slots on the board are unused. Lately I've been thinking in terms changing it to a dual monitor so that I can use one console for documentation/help/sample code/whatever, the other one to play with code.
Assuming this board can handle a PCI GPU, can an AGP4x board coexist with a PCI GPU?