when you mean sucky performance what exactly do you mean?
in my case:
Model: GeForce FX 5900 Ultra
Video BIOS: 04.35.20.22.00
Card Type: AGP
AGP Rate: 8x
Fast Writes: Enabled
I guess nvagp is supported on whatever your mobo chipset is?
otherwise the performance will be sucky
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce FX 5900 Ultra/AGP/SSE2
OpenGL version string: 1.4.1 NVIDIA 53.28
similar card, and ive had no issues at all, although 46.20 was faster here