Onboard Buttons, Switches And Leds - Gigabyte GA-Z87X-UD4H User Manual

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Onboard Buttons, Switches and LEDs

BIOS Switch and BIOS LED Indicators
The BIOS switch (BIOS_SW) allows users to easily select a different BIOS for boot up or overclocking, helping to
reduce BIOS failure during overclocking. The SB switch allows enabling or disabling of the Dual BIOS function.
The LED indicator (MBIOS_LED/BBIOS_LED) shows which BIOS is active.
P D I
1
3 2 1
1
1 2 3
Quick Buttons
D I P
This motherboard has 3 quick buttons: power button, reset button and clear CMOS button. The power button
and reset button allow users to quickly turn on/off or reset the computer in an open-case environment when
they want to change hardware components or conduct hardware testing. Use the clear CMOS button to clear
the BIOS configuration and reset the CMOS values to factory defaults when needed.
• Always turn off your computer and unplug the power cord from the power outlet before clearing
the CMOS values.
• Do not use the clear CMOS button when the system is on, or the system may shutdown and
data loss or damage may occur.
• After system restart, go to BIOS Setup to load factory defaults (select Load Optimized Defaults) or
manually configure the BIOS settings (refer to Chapter 2, "BIOS Setup," for BIOS configurations).
Hardware Installation
BIOS Switch:
BIOS_SW
BIOS_SW
SB
1: Main BIOS
2 1
2: Backup BIOS
2 1
BIOS LED Indicators:
BBIOS_LED
BBIOS_LED (The backup BIOS is active)
MBIOS_LED
MBIOS_LED (The main BIOS is active)
1 2 3 4
P D I
P D I
3 2 1
4 3 2 1
1 2 3
D I P
1 2 3 4
D I P
PW_SW
PW_SW: Power button
RST_SW
RST_SW: Reset button
CMOS_SW: Clear CMOS Button
CMOS_SW
- 22 -
SB
2
(Boot from the main BIOS)
2
(Boot from the backup BIOS)
DIP
P D I
4 3 2 1
1 2 3 4
D I P
1: Dual BIOS
1
2: Single BIOS
1
DIP
DIP
1 2 3
1 2 3 4