Smart Switches - ASROCK Z87 Extreme9/ac User Manual

2.7 Smart Switches

he motherboard has three smart switches: Power Switch, Reset Switch and Clear
CMOS Button, allowing users to quickly turn on/of the system, reset the system or
clear the CMOS values.
Power Switch
(PWRBTN)
(see p.11, No. 19)
Reset Switch
(RSTBTN)
(see p.11, No. 20)
BIOS Selection Switch
(BIOS_SEL1)
(see p.11 No. 17)
his motherboard has two BIOS chips, a primary BIOS (BIOS_A) and a backup BIOS (BIOS_
B), which enhances the safety and stability of your system. Normally, the system will work
on the primary BIOS. However, if the primary BIOS is corrupted or damaged, just lip the
BIOS Selection Switch to "B", then the backup BIOS will take over on the next system boot.
Ater that, use "Secure Backup UEFI" in the UEFI Setup Utility to duplicate a working copy
of the BIOS iles to the primary BIOS to ensure normal system operation. For safety issues,
users are not able to update the backup BIOS manually. Users may refer to the BIOS LEDs
(BIOS_A_LED or BIOS_B_LED) to identify which BIOS is currently activated.
Power Switch allows users
Power
to quickly turn on/of the
system.
Reset Switch allows
users to quickly reset the
Reset
system.
BIOS Selection Switch allows
A B
the system to boot from either
BIOS A or BIOS B.
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