Asus Rog Maximus X Apex User Manual page 28

6. ReTry button (RETRY_BUTTON)
The ReTry button is specially designed for overclockers and is most useful during the
booting process where the Reset button is rendered useless. When pressed, it forces
the system to reboot while retaining the same settings to be retried in quick succession
to achieve a successful POST.
7. BIOS Switch button (BIOS_SWITCH)
The motherboard comes with two BIOS chips. Press the BIOS button to switch BIOS
and load different BIOS settings. The nearby BIOS_LEDs indicate the currently
selected BIOS.
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Chapter 1: Product Introduction