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PCIe ON/OFF
Switch
(SWITCH1)
(see p.1 or 2 No. 14)
1. Make sure that you power off the system before changing the switch.
2. When you turn off PCIe ON/OFF switch, your PCIE card could be burnt if it was poorly
designed. For more information about your card's specifications please contact the card's
vendor.
3. PCIe ON/OFF switch is for debug only. If you do not want to use your PCIE card, please
remove it from the motherboard.
Slow Mode Switch
(SLOWMODE1)
(see p.1 or 2 No. 17)
BIOS Selection
Switch
(BIOS_SEL1)
(see p.1 or 2 No. 32)
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 or 2, No. 18)
36
PCIe ON/OFF Switch allows
1: PCIE1
you to enable and disable the
2: PCIE2
corresponding PCIE x16 slots.
3: PCIE4
When one of the installed
4: PCIE6
PCIE x16 cards is out of order,
you can use PCIe ON/OFF
Switch to find out the faulty
one just with a single click
without removing the cards.
If Slow Mode is on, the proces-
sor runs at lowest frequency.
BIOS Selection Switch allows
A
B
the system to boot from either
BIOS A or BIOS B.
The LN2 mode aids in
eliminating the cold-boot bug
issues in processors during
extreme overclocking with
Liquid Nitrogen.
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