So, Ive discovered this by accident when trying to convert one of p5kpl bios to support 8gb of ram by using modules from a752 as I’ve figured it’s more complicated than editing SMBIOS module (I’ve managed to splice a752 memory controller and module addreses into p5kpl SMBIOS and it worked with the original (p5kpl) phisical memory array handle).
What I’ve discovered blingly poking the rom, that if you insert a752 04module into p5kpl user interface changes in the bios, whitch was a surprise.