ASROCK 770 EXTREME3 User Manual page 21

Power LED Header
(3-pin PLED1)
(see p.10 No. 19)
Chassis Speaker Header
(4-pin SPEAKER 1)
(see p.10 No. 17)
Chassis and Power Fan Connectors
(3-pin CHA_FAN1)
(see p.10 No. 20)
PWR_FAN_SPEED
(3-pin PWR_FAN1)
(see p.10 No. 37)
CPU Fan Connector
(4-pin CPU_FAN1)
(see p.10 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.10 No. 8)
Please connect the chassis
1
power LED to this header to
PLED-
PLED+
indicate system power status.
PLED+
The LED is on when the system
is operating. The LED keeps
blinking in S1 state. The LED is
off in S3/S4 state or S5 state
(power off).
Please connect the chassis
1
speaker to this header.
SPEAKER
DUMMY
DUMMY
+5V
Please connect the fan cables
to the fan connectors and
match the black wire to the
GND
+12V
CHA_FAN_SPEED ground pin.
+12V
GND
Please connect the CPU fan
cable to this connector and
match the black wire to the
ground pin.
1 2 3 4
Pin 1-3 Connected
3-Pin Fan Installation
Please connect an ATX power
12 24
supply to this connector.
1 13
2 1 2 1 2 1 2 1 2 1