It may help explain things here to note that when a company like Sony orders a load of mobo's from someone like Asus the boards they get are indentified as an Asus board of a specific type BUT

BUT!!!!

because the company that ordered them wants proprietary rights to the OEM computer they are building quite often the bios is DIFFERENT between their board and the 'stock' board that a mobo manufactirer sells under the same part number/board type.

Using the Asus bios update MAY destroy your ability to even boot.

I hope this helps.