Hi-Fi Z77S/ Hi-Fi H77S UEFI BIOS Manual
Boot Option #1
The 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.
CD/DVD ROM Drive BBS Priorities
This item sets the order of the legacy devices in this group.
Hard Drive BBS Priorities
This item sets the order of the legacy devices in this group.
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