Another possible way for this is by crossflashing it with Rev 3.0 bios, the board is a bit similiar seeing from the physical looks, might work or might not work. You can use a CH341A or Flashrom/Flashprog for it.
I have compiled flashprog v1.5 last month (you can see it here), and maybe you can test it to dump your own bios before writing the rev 3.0 bios.
DWYOR 