I recently received this, likely HP OEM, P2B98-XV. Looking at the board and the internet I noticed there are two highly similar variants of this specimen, one with an AGP slot and one without.

https://theretroweb.com/motherboards/s/asus-p2b98-xv-hp-oem
https://theretroweb.com/motherboards/s/asus-p … b98-xv-hp-oem-2

What are the chances of simply adding the missing AGP slot into the board and having it work? I understand adding missing power delivery components and flashing the bios from AGP model might be needed.