MSI MS-7173 User Manual page 47

MS-7173 M-ATX Mainboard
1st/2nd/3rd Boot Device
The items allow you to set the sequence of boot devices where BIOS attempts
to load the disk operating system.
Boot From Other Device
Setting the option to [Enabled] allows the system to try to boot from other device
if the system fails to boot from the 1st/2nd/3rd boot device.
Hard Disk Drives, Removable Drives, CD/DVD Drives
Press <Enter> to enter the sub-menu. Then you may use the arrow keys (
to select the desired device, then press <+>, <-> or <PageUp>, <PageDown>
key to move it up/down in this priority list.
3-10