Asus P5GC-VM User Manual page 42

5. CPU and Chassis fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN)
The fan connectors support cooling fans of a total of 1A~2.2A (26.4W max.)
at +12V. Connect the fan cables to the fan connectors on the motherboard,
making sure 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. Insufficient air
flow inside the system may damage the motherboard components. These are
not jumpers! DO NOT place jumper caps on the fan connectors.
P5GC-VM Fan Connectors
6. Digital Audio connector (4-1 pin SPDIF_OUT)
This connector is for the S/PDIF audio module to allow digital sound output.
Connect one end of the S/PDIF audio cable to this connector and the other
end to the S/PDIF module.
P5GC-VM Digital Audio Connector
The S/PDIF out module is purchased separately.
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CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
CHA_FAN
SPDIF_OUT
Chapter 1: Product introduction