Boot Option Priorities; Boot Override - Asus A78M-A Manual

The DBX file must be formatted as a UEFI variable structure with time-based authenticated
variable.
2.8.10

Boot Option Priorities

These items specify the boot device priority sequence from the available devices. The
number of device items that appears on the screen depends on the number of devices
installed in the system.
• To select the boot device during system startup, press <F8> when ASUS Logo
appears.
• To access Windows OS in Safe Mode, press <F8> after POST.
2.8.11

Boot Override

These items displays the available devices. The number of device items that appears on
the screen depends on the number of devices installed in the system. Click an item to start
booting from the selected device.
ASUS A78M-A 2-31