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Hardware Installation
1-8 Onboard Buttons, Switches, and LEDs
BIOS Switches and BIOS LEDs
The DualBIOS switch (SB) allows enabling or disabling of the Dual BIOS function. 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 LED indicator (MBIOS_LED/BBIOS_LED) shows which BIOS is active.
DualBIOS Switch:
MBIOS_LED (The main BIOS is active)
BBIOS_LED (The backup BIOS is active)
BIOS LED Indicators:
2: Single BIOS
1: Dual BIOS
SB
BIOS Switch
2:Backup BIOS
1:Main BIOS
BIOS_SW
F_USB30
F_U
B_
F_
F_
_
B
BS_
B
SB_
B
_S
S_
_
B
_U
_
B
S
1 2 3
12
3
12
3
12
3
1
1
1
1
BSS
S
_S
SSU
1
2
3
S3
BSSS
U
__
3
F_USB3F
S
_
S
_
S
_
SF
B_
B_
F
_0
S
S
_0F
_F
_
_
__B
U
S
_S
_
2
1
F_USB30
F_U
B_
F_
F_
_
B
BS_
B
SB_
B
_S
S_
_
B
_U
_
B
S
1 2 3
12
3
12
3
12
3
1
1
1
1
BSS
S
_S
SSU
1
2
3
S3
BSSS
U
__
3
F_USB3F
S
_
S
_
S
_
SF
B_
B_
F
_0
S
S
_0F
_F
_
_
__B
U
S
_S
_
2
1
F_USB30
F_U
B_
F_
F_
_ B
BS_ B
SB_ B
_S
S_ _ B
_U _ B
S
12
3
12
3
1 2 3
12
3
1
1
1
1
BSS
S
_S
SSU
1
2
3
S3
BSSS
U
__
3
F_USB3F
S
_
S
_
S
_
SF
B_
B_
F
_0
S S
_0F
_F
_
_
__B
U
S
_S
_
2
1
F_USB30
F_U
B_
F_
F_
_ B
BS_ B
SB_ B
_S
S_ _ B
_U _ B
S
12
3
12
3
1 2 3
12
3
1
1
1
1
BSS
S
_S
SSU
1
2
3
S3
BSSS
U
__
3
F_USB3F
S
_
S
_
S
_
SF
B_
B_
F
_0
S S
_0F
_F
_
_
__B
U
S
_S
_
2
1
SB
BIOS_SW
MBIOS_LED
BBIOS_LED
Status LEDs
The status LEDs show the current state of the CPU, memory, graphics card, and BIOS. If a particular LED is
on, that means the corresponding device is not working normally.
CPU
DRAM
VGA BOOT
CPU:
CPU status LED
BOOT:
BIOS status LED
DRAM:
Memory status LED
VGA:
Graphics card status LED