Ok, I appologise for this before I say it, but do you know the card is 128MB?
It could be that the chip is a "rage 128", but you only have 16MB ram. I've just swapped out a 16MB Rage 128 for a 64 MB Geforce because my games couldn't run on a 16Mb card. If you're thinking of upgrading graphics to play games, do what I didn't, check you have a high enough Power supply, and that you've got enough cooling in the system. my card's turning out more expensive than I thought.