|This is your mboard:|
Manual for both versions here:
You have onboard ATI AGP 2X video, no AGP video slot, two PCI slots (white), two ISA slots (black).
Please answer ALL questions.
Do you have at least one free slot?
If so which type is it?
What card(s) do you have in (a) slot(s) and which slot(s) do you have them in?
Are any of them video cards?
Onboard video IS NOT A CARD!
If so, which brand and model?
Which ports are the 3 monitors/projectors connected to, or are you connected them to a video splitter box and to one video port?