ASROCK 770DE3L User Manual page 25

D. MIC_RET and OUT_RET are for HD audio panel only. You don't
need to connect them for AC'97 audio panel.
System Panel Header
(9-pin PANEL1)
(see p.10 No. 26)
Power LED Header
(3-pin PLED1)
(see p.10 No. 29)
Chassis Speaker Header
(4-pin SPEAKER 1)
(see p.10 No. 27)
Chassis and Power Fan Connectors
(4-pin CHA_FAN1)
(see p.10 No. 13)
(4-pin PWR_FAN1)
(see p.10 No. 38)
CPU Fan Connector
FAN_SPEED_CONTROL
(4-pin CPU_FAN1)
CPU_FAN_SPEED
(see p.10 No. 5)
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.
PLED+
This header accommodates
PLED-
PWRBTN#
several system front panel
GND
functions.
1
DUMMY
RESET#
GND
HDLED-
HDLED+
Please connect the chassis
1
power LED to this header to
PLED-
PLED+
PLED+
indicate system power status.
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
speaker to this header.
DUMMY
DUMMY
+5V
Please connect the fan cables
to the fan connectors and
GND
+12V
match the black wire to the
CHA_FAN_SPEED
FAN_SPEED_CONTROL
ground pin.
GND
+12V
PWR_FAN_SPEED
FAN_SPEED_CONTROL
Please connect the CPU fan
4
cable to this connector and
3
+12V
2
match the black wire to the
GND 1
ground pin.
Pin 1-3 Connected
3-Pin Fan Installation
2 5 2 5 2 5 2 5 2 5