Backwards compatibility PCI gfx cards

[Sparks.nl]

Hi all, 

Just like the titles said. I am looking for some info for backwards compatibility for PCI gfx cards. When searching: The only info I get is PCIe related, I am looking for the older standard. I completely forgot about how this worked back then. 
Example: Can a PCI 3.0 card be run on a 2.x board.

Edited November 27, 2020 by Sparks.nl

[moi_kot_lybit_moloko]

i have XFX FX5200 256mb PCI, and it doesnt work with PCI version 2.1 mboards (i test on ALi ALADDiN 5 and VIA MVP3), and perfectly works with PCI version 2.2 (i815 and newer)

[Sparks.nl]

Thanks.
Interesting, I own an FX5500 which does work on my Ali alladin 5 and VIA MVP3 boards. 

[Antinomy]

On 1/13/2021 at 4:51 PM, Sparks.nl said:

I own an FX5500 which does work on my Ali alladin 5 and VIA MVP3 boards. 

@moi_kot_lybit_moloko, most likely this is because your cards need 3.3V in PCI slot and socket 7 boards don't have it. Check out PCI pinout, check for 3.3V. Addind ATX 3.3V from PSU might help with this.