Aaeon SBC-598 Manual page 68

If you select this option and press <ENTER>, the values entered
in the setup utility will be recorded in the chipset's CMOS
memory. The microprocessor will check this every time you turn
your system on and compare this to what it finds as it checks the
system. This record is required for the system to operate.
Selecting this option and pressing <ENTER> lets you exit the
setup utility without recording any new values or changing old
ones.
60 SBC-598 User Manual