ASROCK Z170 OC FORMULA User Manual page 35

PCIe ON/OFF
Switch
(SWITCH1)
(see p.7, No. 39)
1. Make sure that you power of the system before changing the switch.
2. When you turn of PCIe ON/OFF switch, your PCIE card could be burnt if it was poorly
designed. For more information about your card's speciications 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.7, No. 34)
BIOS Selection
Switch
(BIOS_SEL1)
(see p.7, No. 27)
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.
PCIe ON/OFF Switch allows
ON
you to enable and disable the
1 2 3 4
corresponding PCIE x16 slots.
When one of the installed
1: PCIE1
PCIE x16 cards is out of order,
2: PCIE2
you can use PCIe ON/OFF
3: PCIE4
Switch to ind out the faulty
4: PCIE6
one just with a single click
without removing the cards.
If Slow Mode is on, the
ON
processor runs at lowest fre-
quency.
OFF
BIOS Selection Switch allows
the system to boot from either
A B
BIOS A or BIOS B.
Z170 OC Formula
29