There are many like that system still present here, but problem is that you really probably couldn't find any PCI video card, only PCI-x for like fifteen or so years already. Thanks for letting me know this in 2019, cause It's really interesting case to see.
Mobos have evolved a long way. Years back, you'd get up to 6, PCI slots. Then came AGP... Accerated Graphics Port.... one of those for a video card + 5 PCIs Then PCIE in x16, x8, x4, or x1 configuration. Mobos some various mix of those, plus 1 or 2 PCI slots for legacy. Today, I have a workstation with 6x, PCIEx16 slots. (Not all wired with 16 lanes, of course.)
The "third world response robot that digs up five year old threads to generate views" trap. You're better than that.