ASRock X99M Extreme4 User Manual - Page 30

Smart Switches, BIOS A or BIOS B.

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2.7 Smart Switches he motherboard has two smart switches: one Clear CMOS Switch and one BIOS Selection Switch, allowing users to clear the CMOS values or boot from diferent BIOS. Clear CMOS Switch (CLRCBTN) (see p.8, No. 14) Clear CMOS Switch allows users to quickly clear the CMOS values. his function is workable only when you power of your computer and unplug the power supply. BIOS Selection Switch (BIOS_SEL1) (see p.6, No. 27) AB BIOS Selection Switch allows the system to boot from either BIOS A or BIOS B. 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. English 24

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24
English
2.7
Smart Switches
He motherboard has two smart switches: one Clear CMOS Switch and one BIOS
Selection Switch, allowing users to clear the CMOS values or boot from diµerent
BIOS.
Clear CMOS Switch
(CLRCBTN)
(see p.8, No. 14)
Clear CMOS Switch
allows users to quickly
clear the CMOS values.
BIOS
Selection
Switch
(BIOS_SEL1)
(see p.6, No. 27)
BIOS
Selection
Switch allows
the system to boot from either
BIOS A or BIOS B.
His function is workable only when you power oF your computer and unplug the
power supply.
A
B
His motherboard has two B±OS chips, a primary B±OS (B±OS_A) and a backup B±OS
(B±OS_B), which enhances the safety and stability of your system. Normally, the
system will work on the primary B±OS. ´owever, if the primary B±OS is corrupted
or damaged, just µip the B±OS Selection Switch to “B”, then the backup B±OS will
take over on the next system boot. ATer that, use “Secure Backup UE³±” in the UE³±
Setup Utility to duplicate a working copy of the B±OS Iles to the primary B±OS to
ensure normal system operation. ³or safety issues, users are not able to update the
backup B±OS manually. Users may refer to the B±OS LEDs (B±OS_A_LED or B±OS_
B_LED) to identify which B±OS is currently activated.