ASROCK FM2A78M Pro3+ User Manual page 22

HDLED (Hard Drive Activity LED):
Connect to the hard drive activity LED on the chassis front panel. The
LED is on when the hard drive is reading or writing data.
The front panel design may differ by chassis. A front panel module
mainly consists of power switch, reset switch, power LED, hard drive
activity LED, speaker and etc. When connecting your chassis front
panel module to this header, make sure the wire assignments and the
pin assign-ments are matched correctly.
Chassis Speaker Header
(4-pin SPEAKER 1)
(see p.6 No. 7)
Chassis Fan Connector
(4-pin CHA_FAN1)
(see p.6 No. 8)
CPU Fan Connector
(4-pin CPU_FAN1)
FAN_VOLTAGE_CONTROL
(see p.6 No. 2)
Though this motherboard provides 4-Pin CPU fan (Quiet Fan) support, the 3-Pin
CPU fan still can work successfully even without the fan speed control function.
If you plan to connect the 3-Pin CPU fan to the CPU fan connector on this
motherboard, please connect it to Pin 1-3.
ATX Power Connector
(24-pin ATXPWR1)
(see p.6 No. 5)
SPEAKER
DUMMY
DUMMY
+5V
1
GND
FAN_VOLTAGE_CONTROL
FAN_SPEED
FAN_SPEED_CONTROL
FAN_SPEED
FAN_SPEED_CONTROL
GND
12 24
1 13
18
Please connect the chassis
speaker to this header.
Please connect the fan cable
to the fan connector and
match the black wire to the
ground pin. CHA_FAN1 fan
speed can be controlled through
UEFI or A-Tuning.
Please connect the CPU fan
cable to the connector and
match the black wire to the
ground pin.
Pin 1-3 Connected
3-Pin Fan Installation
Please connect an ATX power
supply to this connector.