> Some motherboards even have a backup one Are they detached and non-writable while the primary ROM is active? I have consistently used Gigabyte boards for a d

> Some motherboards even have a backup one Are they detached and non-writable while the primary ROM is active? I have consistently used Gigabyte boards for a decade because of the extra features that come with them, Backup BIOS being a key one — in the old days I would have to flip a jumper on the board to make the system boot from the backup, today the secondary ROM gets automatically enabled if the primary one fails to load. I wouldn't trust the secondary flash ROM on my motherboard to protect me from APT, it's only purpose is to recover from a failed flash.