mannsupreme, I would have to say that the computer that I want to upgrade the graphics card on has a maximum of 1GB of RAM, and can't support any more than that. However, I haven't upgraded the video card of our library computer, and am adding even more RAM to it right now. Speaking of our library computer, it has 2GB of RAM, and will have 4GB of RAM when I upgrade. However, as the installation of Windows XP on the library computer is 32-bit, only 3.25GB of RAM will be detected. That won't bother me any.
The computer that has 1GB of RAM is a Dell that is in our basement, which I upgraded last year. I was thinking of getting a better video card as Doom 3 has a choppy framerate when played on the Dell in higher resolutions.