I thought so! The symptoms you were describing seemed very familiar.
That's because you need version 3.5 of the drivers. 3.0 v1.1 (Apr, 2002) is meant to update older versions of OS 9 drivers on older models of computer using older models of Nvidia cards. The card from the MDD (particularly the 2003 model) needs version 3.5 or else it won't work. I speak from experience, because I spent hours trying to find those drivers when I got that card (and it was actually for a Sawtooth model, not Quicksilver. My mistake. However, the information and experience still apply.)
There's actually a mention of a similar problem (with a link to the drivers) on this forum over here.
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