I am not sure what a video card is. Yes, I know it is a pci or agp thing that can share or have own memory. More mem the better. I know some have svideo or composite. But isn't a video card just some way of seeing what the computer is doing? Couldn't two video cards be done at once. What is need for on board memory or advantages.
Moreover, if I have one onboard, what are steps to disable old one and put a new one in. Do I need to disable old one? What are risks? How does one "see" to control a computer if all are disabled?