PLS HELP ME!!! Poor 3D performance

[unhuman]

I have a system which should have pretty good scores....
Athlon 1100 - MSI K7T Pro2A - 512 Meg Ram
VisionTek GeForce3 Ti500 - 64 Meg
40 Gig 7200 RPM drive

This machine dual boots win2k and win98

I'm seeing very weird things. My 3DMark 2000 scores are much better on Win2k than on win98. 3DMark 2001 runs fine on Win2k, but fails with errors on Win98.

My scores:
3DMark 2000
Win2k
App Control (no AA) 7911
Quincinx 6251
Win98
App Control (no AA) 4740
Quincinx 4776

3DMark 2001
Win2k
App Control (no AA) 5902
Quincinx 4473
Win98
App Control (no AA) fail after a few tests
Quincinx fail after a few tests

The errors I see on Win98 are:
1. No Z Buffer
2. 3D Mark could not initialize your 3D accelerator.
Try to downgrade your display settings
DirectX Error Message setFullscreeen -
creating the device failed: E_OUTOFMEMORY

After the errors occur on Win98, no DirectX stuff works anymore.

What kind of numbers should I be expecting from this system and how can I make it work better.

Thanks for your help.

-Howie

 

[unhuman]

It's better but it ain't fixed. Things I did:
1. Found out that my old card was still in directX settings - and my new card too. Uninstalled drivers and reinstalled drivers - now only the new card shows.
2. Upped the AGP Textures memory in BIOS to 128 Meg. This seemed to help alot. I can now run through with AA off one time, but the second attempt fails. My score is good. 3DMark 2001 - 6178. If I run with Quicinx (or whatever they call it), it crashes with either memory error or a hard hang.

-Howie