In general, some mobo's update (BIOS Flashing) also flash the built-in IDE (or RAID) controller too. Check Asus BIOS update info. Remember to back up your files in the RAID drives that connected to the controller. Sometimes, after flashing, you can't access them and you might end up rebuilt RAID array.
:smile: Good or Bad have no meaning at all, depends on what your point of view is.