Yup... UPGRADE!
No, really.... You can get a Voodoo II to piggyback with your old 128 for
around $60 over the net!
I did, and don't regret it one bit! Let's face it your 128 was a good card
for a few months a year or two ago, when it was cutting edge, but once the
TNT came out, the support for the old 128 basically dropped!