AGP voltage regulator notes: There is a problem with the combination of older motherboards and newer AGP graphic cards. This is due to the fact that some of the early AGP motherboards used a linear regulator to control the power supply to the AGP slot. Linear regulators can supply at most 2.5A of current, while the switching regulator used on newer motherboards can supply up to 6A at 3.3V. When these motherboards with linear regulators were produced, the average consumption of a graphics card was 1 to 2A, making a supply of 2.5A more than sufficient. Since then, graphic cards have developed and currently the average consumption is between 4 and 5A. This is no problem for motherboards using a switching regulator, but older boards with a linear regulator may run into issues such as overheating, burnouts, and lockups.
So try to find out what type of regulator is on that board. If it's a late revision board it should be fine i think.
Safe cards for the older linear regulators should be: Geforce2 MX, MatroxG200, TNT1/TNT2 M64, Voodoo Banshee. Voodoo3 3000 will be too much, don't know about the 2000 but i wouldn't risk it.
Banshee is a perfect match for a fast k6-2 anyway, v3 comes to life with p3.
In my experience Nvidia cards are a hit and miss on ss7 boards when it comes to stability. I have a GTS in my asus p5b but a gf2Ti or MX will not run stable. So matrox and 3dfx are your best choices.
If you want absolute trouble-free operation and take no chances with voltage regulators: Use a PCI card.
asus tx97-e, 233mmx, voodoo1, s3 virge ,sb16
asus p5a, k6-3+ @ 550mhz, voodoo2 12mb sli, gf2 gts, awe32
asus p3b-f, p3-700, voodoo3 3500TV agp, awe64
asus tusl2-c, p3-S 1,4ghz, voodoo5 5500, live!
asus a7n8x DL, barton cpu, 6800ultra, Voodoo3 pci, audigy1