[G4] Graphics card memory question.

[John Niven]

I have merrily gone along with the idea that more memory on a graphic card is good, but now I find myself asking why?

I can understand that the size of the ram would effect how many pixels you can drive and how many levels of color, but if you already have a card that can max out your monitors capability, what advantage (if any) would there be to getting an equivalent card with more ram?

Anyone?