The usual suspects..? Voodoo3, TNT2, Matrox G400.

G400 might be out of question unless a PCI version exists, mobo uses MVP4 which has no AGP slot by design

I really like using an MX440 card with my K6-III system, I think it's a good pairing, but it's almost always found as an AGP card. I see a couple of PCI versions on eBay right now, e.g. "MX-400-PCI", but pricey around $70, and the MX400 is a bit slower than the MX440.

IBM Aptiva would pair the AMD K6 with ATI Rage.

But this Nvidia FX 5500 has a DVI port. You could add an HDMI adapter and use it with a Modern Display.

I'd go for a Riva TNT2 PCI if the budget allows it. Highest I would go is Geforce 2 MX400 if it has a PCI version but no higher than that.

Have you tried it with the onboard video? Apparently that chipset has integrated Trident Blade3D or Cyberblade graphics which are .... Not great. But a K6-2 500 isn't really "fast" for games made after 1998 anyway, and will massively bottleneck most GPUs (meaning, GeForce or better) so it might be enough for your needs.

Otherwise, any PCI graphics card from the original Riva TNT and up should be an improvement. It's just a matter of what you want to do with the machine.

Here are some nice benchmarks with a variety of cards on a similar K6-2 setup.
Sharing my benchmark results on a AMD k6-2 with various AGP cards

Notice that even with massively overpowered AGP cards, performance doesn't really increase that much beyond a TNT2, it's tough to even break 30fps and 40fps is basically not going to happen in intensive games from 1999 or later, regardless of the GPU being used.

I would go for an S3 Trio 64 for DOS gaming with a Voodoo 2 for early Windows games. That's assuming you don't already have a DOS PC. You can get Voodoo 3 PCI, but they are rarer and pricy. I think anything newer than a TNT will be bottlenecked by CPU.

Intel486dx33 wrote on 2025-04-05, 18:24:

IBM Aptiva would pair the AMD K6 with ATI Rage.
(...)

The Aptiva came with the diet version of the Rage IIc and a meager 2MB of vram. I'd call this just enough for pumping some image to the screen. You can play games with it if you like slide shows, but adding a TNT or Voodoo2 does make the difference. I'd suggest upgrading that
My Acer Aptiva 2137 has the Voodoo2 and a K6-233 and games like Midtown Madness are quite playable at 800x600 😀
The tnt2 m64 is a little faster, probably easier to find.

You might even go for something less regular like the Kyro, which would make sense as a bang for buck later upgrade card on a bang for buck machine 😀

K6-2 and K6-3 likes Geforce2 and Geforce3.

I was also hoping to look into this as i have two pci cards but neither worked with my motherboard. A x1300 and hd 3450, as far as i can tell some cards that might work are ati rage 128, radeon 9xxx and below but maybe too fast for a k6-2, nvidia tnt, 3dfx, or kyro, i don’t know much about these cards however so take this with a grain of salt. Hope this helps

S3 Savage4, Matrox G450.

marxveix wrote on 2025-04-05, 21:47:

K6-2 and K6-3 likes Geforce2 and Geforce3.

True, if you're system has AGP I'd call for the Gf4 mx440 as upper option: speed on par with Gf2 gtx and half the power usage.
The board OP uses die not have AGP and the tnt2 M64 would already fill up PCI bandwidth.

I tested on a K6-2 450 (4,5x100, mvp3) system and the Gf2 Mx PCI was 1% faster than the TNT2 m64. The Fx5200 PCI was even a little slower and Ati 9200 PCI wasn't faster at all.

Ozzuneoj wrote on 2025-04-05, 20:24:

But a K6-2 500 isn't really "fast" for games made after 1998 anyway, and will massively bottleneck most GPUs (meaning, GeForce or better) so it might be enough for your needs.

Geforce2-permitting, I'd stretch it to mid-2001.

Add Rage Pro/ Rage Pro Turbo 4 - 8MB PCI editions to the list, they are great in 3DCIF/D3D/OPENGL/ATiDVD, made myself latest 3DCIF version of it for Rage XL AGP 8MB.DVD acceleration DVD should work well, with only Software mode it may be slow with K6-2. Later you can add Voodoo 1 or 2 addon in the mix if you get it, even with Rage Pro its possible to emulate 3Dfx and play small list of 3Dfx games, but it may need faster CPU then, like Pentium 3. 8MB is faster than 4MB and AGP 8MB is the best, Mac had even 16MB version, but this luxury was not for Regular PC, here 8MB is the max and recommended.