Asus Motherboard M2S-X - Manual (Page 79)

ASUS M2S-X 2-37
Exit & Discard Changes
Select this option only if you do not want to save the changes that you
made to the Setup program. If you made changes to fields other than
System Date, System Time, and Password, the BIOS asks for a confirmation
before exiting.
Discard Changes
Allows you to discard the selections you made and restore the previously
saved values. After selecting this option, a confirmation appears. Select Ok
to discard any changes and load the previously saved values.
Load Setup Defaults
This option allows you to load the default values for each of the
parameters on the Setup menus. When you select this option or if you
press <F5>, a confirmation window appears. Select Ok to load default
values. Select Exit & Save Changes or make other changes before saving
the values to the non-volatile RAM.