because there are conflicting results, you might get lucky somehow, but most likely it wont work

Would be interesting to fully investigate what is causing this. My guess would be something like Adlib speed problems Re: Speed Affected Sound Blasters where OPL2 has a speed limits lower than the speed of ISA bus so drivers need to manually slow down, not many people writing games/audio libraries implemented that because it worked fine with contemporary cpus. Maybe Voodoo1 also has some IO speed limits, one would either need hand build glide driver full of artificial IO delays or program 3dfx directly at a low level to verify this theory.

At regular clock, Athlon is too fast. As is Pentium III. You may see broken textures, I can confirm that for 1Ghz CPU.
What was the upper limit ... Pentium II ~300Mhz ?

Dang. That's unfortunate. Thanks for the replies!

stef80 wrote on 2023-09-17, 03:53:

What was the upper limit ... Pentium II ~300Mhz ?

The upper limit is PIII-500 for the Voodoo Graphics card. It becomes slightly higher if the FSB is set to 66 MHz.

Back in the day I used a Voodoo 1 with an Athlon 500MHz CPU without any problems whatsoever, that was on Linux though.

With a KT7-RAID motherboard I ran a Voodoo 1 successfully with a Duron up to 600mhz.
However with modded bios and a Barton Athlon cpu 500 mhz was the limit. I think the extra cache on the Barton
cpu causes issues as it effectively makes for a faster cpu than a duron at the same clock speed.
If You can run the cpu at 100mhz fsb with a low multi of 5 it may be ok.

I had one working with a Celeron 600, which is 66mhz bus speed.