Wew boy this system likes to throw me problems.
I had a Geforce 2 in it, but I wanted to play Morrowind and figured, eh, why not throw in a Geforce 4?
Problem- it doesn't work. At all. No 3D. It works fine in 2D for GUI stuff, but DXDIAG fails.... but is more stable during the DX8 and DX9 tests than DX7, oddly enough.

The board has a Via 133A chipset, and I've removed everything except that video card- so what the hell is the problem? Is there a suggested driver to use? I've messed around with everything Via offers without success.

E: AGP 4x and fast write are both disabled.
E2: This is under XP, I had the same problems under 2K and decided to upgrade and see if that fixed it- N O P E

E: Dangit this Geforce 2 GTS was working fine under 2K and now it's bust under Xp aaaaaa I've gone backwards.

E4: Dual P3 933 (same stepping) with 256+128+128 ram.
E5: DXdiag works 100% fine on Windows 98SE with AGP acceleration on... using the same drivers. Actually took me a very long time to find a driver set that worked for 98SE. I had to /not/ install chipset drivers (98 comes with working ones) and use a very specific version.

E6: 30.82 appears to work. The Geforce 2 GTS running at AGP 2x completes DXDIAG. Will it at 4x?
E6.2 Nope, :p. Will try the GF4 now.
E6.3 Nooope.

Nvidia Drivers that have /not/ worked for the GF2:
28.32
~30.82 works~
62.20
71.84
Nvidia drivers that have not worked for the GF4: (E: Breakthough, the GF4 is /more stable on AGP 4X than 2X. The exact opposite of the GF2, ugh.) [Retesting these at AGP 4x- it's /more/ stable... but not completely stable. This is akin to Win 2k before I found the magic driver that worked.... so I just need to find it again.]
28.32
30.82
40.72
41.09
45.23 (Completes DXDIAG at AGP 4x, reports as AGP 2x in drivers. Crashes during part 2 of 3dmark 2003.)
52.16
56.72 (Completes DXDIAG at AGP 4x, reports as AGP 2x in drivers. Crashes during part 2 of 3dmark 2003.)
61.94
67.66 (Completes DXDIAG at AGP 4x, reports as AGP 2x in drivers. Crashes during part /1/ of 3dmark 2003.)
71.84
81.85 (Completes DXDIAG at AGP 4x, reports as AGP 2x in drivers. Crashes starting 3dmark 2003)
91.28 (Completes DXDIAG at AGP 4x, reports as AGP 2x in drivers. Crashes starting 3dmark 2003)
Asus Drivers that don't work:
52.16 (Works with AGP off, passed DXDIAG... and 3DMark crashed after loading aaaugh so close.)
56.55 (Passes DXDIAG with AGP on... at 4X? Oh my this might be progress! 3Dmark crashes though ;-;)
56.72 (Starts passmark... crashes- at 4X)
71.81 (Works with AGP off, however. Worls at 4X, gets half way through passmark, crashes.)
71.84 (Also will do DXDIAG with AGP off- but won't run Passmark so welp.)

Welll that's about all I care to try, GF4 is just fucked on it I guess.