Asus Motherboard P5LD2 - Manual (Page 104)

4-44 Chapter 4: BIOS setup
Load Setup Defaults
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 the default values.
Select Exit & Save Changes or make other changes before saving the
values to the non-volatile RAM.-