ASRock Z87 OC Formula/ac User Manual - Page 42

PCIe ON/OFF Switch allows, BIOS A or BIOS B.

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PCIe ON/OFF Switch (SWITCH1) (see p.11 or 12 No. 14) 1234 ON 1: PCIE1 2: PCIE2 3: PCIE4 4: PCIE6 PCIe ON/OFF Switch allows you to enable and disable the corresponding PCIE x16 slots. When one of the installed 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. 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.11 or 12 No. 17) OFF ON If Slow Mode is on, the processor runs at lowest frequency. BIOS Selection Switch (BIOS_SEL1) (see p.11 or 12 No. 32) AB BIOS Selection Switch allows the system to boot from either BIOS A or BIOS B. 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. ON OFF English LN2 Mode Switch (LN2MODE1) (see p.11 or 12, No. 18) 36 The LN2 mode aids in eliminating the cold-boot bug issues in processors during extreme overclocking with Liquid Nitrogen.

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36
English
PCIe ON/OFF
Switch
(SWITCH1)
(see p.11 or 12
No.
14)
PCIe ON/OFF Switch allows
you to enable and disable the
corresponding PCIE x16 slots.
When one of the installed
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.
Slow Mode Switch
(SLOWMODE1)
(see p.11 or 12
No.
17)
If Slow Mode is on, the proces-
sor runs at lowest frequency.
BIOS
Selection
Switch
(BIOS_SEL1)
(see p.11 or 12
No.
32)
BIOS
Selection
Switch allows
the system to boot from either
BIOS A or BIOS B.
LN2 Mode Switch
(LN2MODE1)
(see p.11 or 12, No. 18)
°e LN2 mode aids in
eliminating the cold-boot bug
issues in processors during
extreme overclocking with
Liquid Nitrogen.
ON
1234
1: PCIE1
2: PCIE2
3: PCIE4
4: PCIE6
ON
OFF
ON
OFF
A
B
°is 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.
Aſter 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.
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.