Installed a Radeon 9200. Runs slower than dirt! Ideas?

I upgraded (well, I THOUGHT I did....) my test PC by taking out the ATI

Rage 128 AGP card and putting in a new ATI Radeon 9200 AGP card in its place,

and installed the drivers.


I now have the very useful ability to run a monitor and a projector at the

same time, as I use this PC for testing and alignment of projectors that

I work on and sometimes sell.


Previously, with the Rage 128, DVDs played via ZoomPlayer were played

virtually flawlessly. I'd be hard pressed to come up with ANY complaints.


But now, it's almost a slide show. And there seems to be NO smoothing

of any kind going on. I can count the blocks and pixels and it really looks

like crap, not to mention slow. I'd guess that 3 of 4 frames are being

dropped.


The PC in question is an older one, with a PII-400 and 128 MB of RAM.


It ran great on the older card.


Any ideas what I might have to do to get this running right?


I've checked all the settings I can think of or find. They all look OK to me.


CJ