Slow Mode Switch
(SLOWMODE1)
(see p.1, No. 15)
BIOS Selection
Switch
(BIOS_SEL1)
(see p.1, No. 29)
This 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 flip the
BIOS Selection Switch to "B", then the backup BIOS will take over on the next system boot.
After that, use "Secure Backup UEFI" in the UEFI Setup Utility to duplicate a working copy
of the BIOS files 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.
LN2 Mode Switch
(LN2MODE1)
(see p.1, No. 13)
Direct Key Button
(DIRKEY1)
(see p.1, No. 14)
XMP Switch
(XMP_ON1)
(see p.1, No. 16)
If Slow Mode is on, the
ON
processor runs at lowest fre-
OFF
quency.
BIOS Selection Switch allows
the system to boot from either
BIOS A or BIOS B.
ON
The LN2 mode aids in
eliminating the cold-boot bug
OFF
issues in processors during
extreme overclocking with
Liquid Nitrogen.
Direct Key Button allows
users to turn on the system
and directly enter the UEFI
setup screen.
ON
The XMP switch allows users
to easily load XMP profiles to
OFF
automatically configure the
overclocked DRAM voltages
for stable operation.
Z170M OC Formula
27