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8. Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port.
Ensure that the audio device of Sound playback is VIA High Denition Audio (the name
may be different based on the OS). Go to Start > Control Panel > Sounds and Audio
Devices > Sound Playback to congure the setting.
The S/PDIF module is purchased separately.
SPDIF_OUT
+5V
SPDIFOUT
GND
M4N68T-M
M4N68T-M Digital audio connector
9. CPU and chassis fan connectors (4-pin CPU_FAN and 3-pin CHA_FAN)
Connect the fan cables to the fan connectors on the motherboard, ensuring that the
black wire of each cable matches the ground pin of the connector.
DO NOT forget to connect the fan cables to the fan connectors. Insufcient air ow inside
the system may damage the motherboard components. These are not jumpers! DO NOT
place jumper caps on the fan connectors.
CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
Rotation
+12V
GND
CHA_FAN
M4N68T-M
M4N68T-M fan connectors
Only the 4-pin CPU fan connector supports the ASUS Q-Fan feature.
ASUS M4N68T-M 1-27