Hey, I still use a Voodoo3 2000 PCI in my brother's Pentium 133. (time for you to upgrade dude)
Anyways, none of the drivers for those things ever really provided too much of an increase in anything. What is more likely to help is a tweak program. But don't OC this thing unless you know what you're doing and have non-stock cooling (the sinks were never quite enough on that Voodoo3). Using the drivers that the card came with, the non-MMX P133 can still run Half-life decently.
Look into that Voodoo3 using the Voodoo5 drivers, i've never heard of that. Turn all quality down, resolution down, and try to use OpenGL or Glide instead of Direct3D, cuz they're faster on the 3dfx cards.
Intrepid6546, i was planning on dual outputting with my old PCI V3 and an AGP MX400, but XP Pro decided it would not work (put one in and the other one would magically crap out in windows). Did you do anything special, or is my mobo just dumb?