Isn´t that the VIA Apollo Pro 133 chipset? In this case AGP2.0 would be supported and an AGP card would be 1st choice.
Oops - this was Apollo Pro 133A - I still would prefer an AGP card.

You can theoretically get semi modern PCI graphics cards, whether they match your OS, desired driver version or game compatibility requirements is another matter.

AGP 1 compatible VRS semi modern PCI will likely lean toward the modern PCI if your cpu can feed it.

AGP Universal - Actual compatability list

I have not noticed what the last “universal “ AGP card was (that not only fit but also worked) maybe someone else has some examples

rmay635703 wrote on 2022-06-16, 18:19:

You can theoretically get semi modern PCI graphics cards, whether they match your OS, desired driver version or game compatibili […]
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You can theoretically get semi modern PCI graphics cards, whether they match your OS, desired driver version or game compatibility requirements is another matter.

AGP 1 compatible VRS semi modern PCI will likely lean toward the modern PCI if your cpu can feed it.

AGP Universal - Actual compatability list

I have not noticed what the last “universal “ AGP card was (that not only fit but also worked) maybe someone else has some examples

on ati side radeon 9800 pro the 128mb version was the last ati card to have cut outs for both grooves in agp slot. on nvidia there are a couple 7000 series that have both but the don't have official 9x drivers. from what i could find a 6800xt made by galaxy specifically was that fastest 6000 series card to have both grooves. all the other cards only have the groove closest to the front of a case.

ECS P6BAP-A+ is a weird motherboard because was released in 2000, when AGP 2.0 (AGP 4X) cards were available, but it has an AGP 1.0 (AGP 2x) slot. This slot has keying to prevent insertion of a card that doesn't support AGP 1.0's 3.3V signaling voltage. Most AGP 2.0 GPUs are backwards compatible with AGP 1.0. That's why most AGP 2.0 cards' connectors have two notches; the notch on the left allows insertion into slots that are only compatible with AGP 1.0, and the notch on the right allows insertion into slots that are only compatible with AGP 2.0. Cards and motherboards that are compatible with both AGP 1.0 and AGP 2.0 are called AGP Universal.

I have a GeForce 2 (AGP 2.0) card and a 440BX (AGP 1.0) motherboard; I have experienced zero compatibility problems when I use them together because the GeForce 2 is AGP Universal.

However, compatibility between a card and a motherboard is never 100% guaranteed, even when their specs indicate that they should work together. Back in 2000, a friend of mine bought a GeForce 2 card and a Socket 370 AGP motherboard (I can't remember which motherboard), and the card and the motherboard were incompatible with each other. He couldn't determine why. Next, he bought a Rage Fury MAXX (AGP 1.0) card to replace the GeForce 2, and the Rage Fury MAXX worked fantastically with his motherboard! So even AGP Universal cards might be incompatible with a quirky motherboard in rare instances; you just have to experiment.

What CPU is it?
According to the manufacturer site, it supports up to 1Ghz Coppermine.

With a 1Ghz Coppermine PentiumIII, I see a good match in Geforce 2 GTS (which is still quite available and inexpensive on eBay). MX440 is also a good alternative. ATi DDR (7200) or 7500 are also suitable if you prefer team red.

If the CPU you have at hand is around 500Mhz, a TNT (1 or 2) won´t cost much either. Unfortunately anything 3DFX is quite expensive nowadays.

Perhaps I've been lucky, but my Epox MVP3G-M has worked with every AGP card I've tried - Geforce 3 Ti 200, Geforce 4 Ti 4600, ATI 9800 SE, FX 5600, and a Quadro 2 Pro.

Avoid ECS P6BAP-A+. It is based on VIA 693A chipset which is infamous for very poor memory performance. Get a board with Intel 440BX or Via 494X / 694T.

As for graphics card FX 5200 is good perhaps for PIII 600. I would use at least FX 5500 with PIII 900-1Ghz.

The board's a slug, but there's no reason not to use AGP over PCI. If nothing else, it gives you a lot more choice as PCI VGA was becoming quite niche by then.

Really you just need to decide between a period-correct card (it's a 2000 board, but very 1999 (low) specs) or a card fast enough not to be a bottleneck. Advantage to period-correct is that everything will be compatible. Look for late S3 Savage (nice with UT MeTaL textures), anything 3dfx, nVidia TNT2/Geforce1, ATi Rage128 or maybe Matrox G400. If you want to max speed (which I wouldn't do on a board with a chipset this slow, it would be pearls before swine), you need to look for universal AGP cards that really can work with 3.3V. Personally I'd go for a GeForce4Ti 4200 (non-8x), but FX-series cards will do the job just as well. Added advantage with these (Gf3/4 or FX) is that you get nVidia's excellent DOS/VESA compatibility. This was dropped on later chips. With a board this slow, DOS is very much an option...

I have a radeon that 9000 seems to work pretty well in most super Socket seven agp motherbords

I have a 9800 pro that works good in some of them (agp ss7)

as for PCI my radeon on 7500 and 9200 pro seems to be a very good one for socket 7 but I have not been able to get PCI video to work on a lot of my super Socket seven motherbord

I see though, that yours is a socket 370 but maybe that helps because it’s around the same time.

Main problem with Radeon 9000 and newer cards - driver overhead.

The Serpent Rider wrote on 2022-06-18, 11:48:

Main problem with Radeon 9000 and newer cards - driver overhead.

9200 scores almost the same as my 7500

9800 is faster.

I can play halo on the 9800 at high res on a k6-3+

I tried getting geforce 2/3 cards working but never had much luck.