ASROCK 770DE3L Quick Installation Manual page 21

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.2 No. 26)
Power LED Header
(3-pin PLED1)
(see p.2 No. 29)
Chassis Speaker Header
(4-pin SPEAKER 1)
(see p.2 No. 27)
Chassis and Power Fan Connectors
(4-pin CHA_FAN1)
(see p.2 No. 13)
(4-pin PWR_FAN1)
(see p.2 No. 38)
CPU Fan Connector
(4-pin CPU_FAN1)
(see p.2 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.
ASRock
This header accommodates
several system front panel
functions.
Please connect the chassis
power LED to this header to
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
speaker to this header.
Please connect the fan cables
to the fan connectors and
match the black wire to the
ground pin.
Please connect the CPU fan
4
cable to this connector and
3
2
match the black wire to the
1
ground pin.
Pin 1-3 Connected
3-Pin Fan Installation
770DE3L Motherboard
2 1 2 1 2 1
2 1 2 1