Voodoo 2 8mb and Voodoo Banshee are somewhat similar in performance.
Maybe put one of the cards in a K6-2/500 and the other in a Mendocino 500?
Could also use something like a Cyrix MII 400GP (@300Mhz) or a P1 MMX (233MHz or overclocked slightly to 250Mhz on 100MHz FSB) instead of either K6-2 or Mendocino.
There's a lot of different CPUs to choose from from 200MHz to 500MHz. You seem to have ample cards so you should have the room to experiment.
Voodoo 3 AGP I used one in a Celeron 800 build, but I'd say anything from 500MHz to 1GHz should be fine (and not even limited to this).
Voodoo 5 AGP you already have in a build which seems fine to me. I'd probably have picked a Tualatin 1.4GHz myself.
I'm somewhat impartial about sound cards, I'd probably just stick one in there (picked somewhat randomly or one that I'm curious about perhaps) and see how things sound 😜
But me personally I'd probably go for something like this if I were to build 4 systems around these cards right now:
- Voodoo 2 8MB Mendocino s370 440LX (anything from 400MHz to 533MHz) Trio3D AGP or maybe even one of the really early Ati AGP cards, the idea being to allow the Voodoo 2 to do most of the 3D work with the crappy AGP card needing only do basic desktop stuff.
- Banshee PCI ss7 with K6-x (plus or non-plus) 400+MHz or perhaps even a Cyrix MII-400GP running at 300MHz(is a very minor overclock which it should be able to do, I don't have any of the 433GP ones). I already made a single Voodoo 2 K6-3 build so I wouldn't want to use the Voodoo 2 in a similar build again. Unsure about the chipset I would want to pick.
- Voodoo 3 Coppermine 700MHz up to 1GHz (prefering a Coppermine on the lower end of this spectrum to make it just a bit easier to silence the cooling) or perhaps even a VIA V3 Nehemiah 1GHz up to 1.2GHz. I wouldn't want to use a Celeron 100MHz FSB CPU for a second time for a Voodoo 3 build and with few real alternatives it would probably be either Coppermine or Nehemiah. i815 chipset preferably.
- Voodoo 5 Tualatin 1400 is what I would put it in.
As OS I'd pick WinME in all 4 builds 🤣