Neither of the two motherboards I'm looking at have an AGP slot. I am hopeful to save the PCI-X slot for an audio card, if possible.
I expected as much. The 6200 runs on PCI 1x, not PCI-X 16x. One of its big advantages, IMO.
What would be the advantages of 256MB of memory? I don't do any gaming at all, and I don't do video editing. I only manipulate images (i.e., Gimp, Inkscape).
Any RAM used to produce graphics of any kind (be they high framerate in Half-Life 2 or smileys on OCnet
) comes from the card first. If the system needs more RAM than your card can provide, it pulls from general RAM. This is okay most of the time, unless the system runs out of general RAM--then you experience lag, which is mildly irritating usually; if it's bad enough, however, it can crash your system.
So how much video RAM you need depends on how you use the computer. For memory-hogging Vista, I'd say 256MB VRAM is minimum. Linux, however, is much more efficient, and you therefore might get away with 128MB still. If it were possible to cannibalize the old computer, the card you have it probably still good. Since you still need the video card in the old one, though, look for more efficient RAM rather than larger capacity. Video RAM is analogous to general RAM; GDDR2 is more efficient than GDDR, just like DDR2 general RAM is more efficient than DDR.