Voodoo 2 performs better than voodoo 1 for carmageddon although you need a second patch which in my experience doesn't work as well as the original voodoo 1 patch (rare crashes, issues with music).
However on a pentium MMX system what will probably limit you the most will be the CPU.
This game has a strange way of scaling performance, and even with a Pentium II 450 with voodoo 2 SLI I couldn't run it at a stable 60FPS. A faster pentium 3 should probably handle it properly.

Carmageddon 3Dfx/Glide is 60FPS on QEMU and OpenGlide, includes upscaling and works on any PC or laptop from the past 5 years with Windows 10 or Linux without requiring a real Voodoo1/2.

Deksor wrote on 2020-12-02, 00:27:

Voodoo 2 performs better than voodoo 1 for carmageddon although you need a second patch which in my experience doesn't work as well as the original voodoo 1 patch (rare crashes, issues with music).
However on a pentium MMX system what will probably limit you the most will be the CPU.
This game has a strange way of scaling performance, and even with a Pentium II 450 with voodoo 2 SLI I couldn't run it at a stable 60FPS. A faster pentium 3 should probably handle it properly.

^this was my experience as well. I found the game to be smoothest when running on a 700mhz pentium 3 or athlon. The game is quite playable on a 400MHz P2 or 500MHz K6-3, but will stutter occasionally. On a pentium MMX with a voodoo 2 it will stutter rather frequently, and on a early pentium (66, 90mhz, POD83) the framerate is quite low.

I remember back in the day it ran well on a really budget oriented PC a friend of mine had. Something like a 333MHz Celeron, 64MB RAM and a Trio64V+ 1MB (I still have this one upgraded to 2MB with a donor card) without any dedicated 3D acceleration. So I don't remember Carmageddon as something difficult to run, but it was around 20 years ago.

However I have a vaguely similar PC as yours, but with a Voodoo 1. If I find the time I'll check how well it does in Carmageddon.

Yes carmageddon unaccelerated is definitely playable on low end systems (and even accelerated).
It may not be optimal but it's playable.

However if you're looking for 60fps+ you need a 700MHz CPU for some reason.

I ran it on a Cyrix mediagx 200 (basically a Cyrix 5x86 at 200mhz with a integrated GPU and sound card) and it was playable as well. I had to reduce the quality a little but it was playable.

So yeah not difficult to run, but has a really strange way of scaling, almost like you have to double your cpu performance to get 5 more fps