If the AGP chip bios is included in the card BIOS, then you can probably splice the AGP adapter chip relevant part of the bios rom another 3450 into the coding for the PCIE one and get it working.
If the AGP chip bios is included in the card BIOS, then you can probably splice the AGP adapter chip relevant part of the bios rom another 3450 into the coding for the PCIE one and get it working.