The Voodoo5 AGP is 3.3V (AGP 1X/2X) only!!! you can put it only on mobos that don't have AGP 8X or only 1.5V (all GOOD recent mobos). Mobos like lower P4 (i.e. ECS) or an P3/P2 mobo has an AGP 3.3V slot.
AGP 1x/2x 3.3V cards are like this (all voodoo AGP cards are xcept some rare prototypes):
and AGP 4X/8X 1.5V are like this:
now, the slots,
AGP slots COMPATIBLE with 3.3V cards
Available on P2/P3/Athlon/some low P4s motherboards:
OR
and AGP 3.3V NOT COMPATIBLE slots:
Available on almost all recent mobos for AMD Athlon XP/64 (single & dual), recent Intel P4,Xeon,ect (single & dual):
AGP Pro:
or
APG3.0 (8X/4X):
Actually, the AGP Voodoo cards aren't different from PCI ones, it will work at the same speed, so getting a PCI is the same thing, the AGP doesn't do anything else on Voodoos.
Also, as sheik said, there is an option in (I think) ALL bioses on mobos with AGP slots an option to set which of the PCI or AGP card will boot up first.
And since your mobo uses the AGP Pro/8x combo (nforce2) slot, it won't work, so don't get any AGP Voodoos.