why don't u add a video card, before that check that ur motherboard has a agp slot or pci-e slot. but i think if 2003 model, it would be an agp slot. so try to check that the mobo support an agp video card because some mobo doesn't have agp slot but only onboard display. I think ur ram n hardisk is good enough so, check the latest graphic card that suitable with ur budget.