The Voodoo3 3500TV
seems to work well under NT4.0 SP5 just fine, how ever it is not shipped
with drivers for NT at all. Download the Voodoo 3-3000 display drivers and
gl/glide drivers from the 3dfx page, the TV viewing/cap options do not
work, I had to boot into 98 for the software to install ('requires
DX6+')... Otherwise, glide, 3d and 2d display was great, glide/open gl
games played just fine. 
Received also a message: tried
latest nt drivers for 2000/3000 under sp5, after restart, it would say
that a new display device has been installed, but defaulting back to std
display driver.