Asus M5A78L-M USB3 User Manual page 37

8. 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.
M5A78L-M/USB3
M5A78L-M/USB3 Fan connectors
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.
Only the 4-pin CPU fan supports the ASUS Q-Fan feature.
9. Serial port connector (10-1 pin COM1)
This connector is for a serial (COM) port. Connect the serial port module cable to this
connector, then install the module to a slot opening at the back of the system chassis.
M5A78L-M/USB3
M5A78L-M/USB3 Serial port (COM1) connector
The COM module is purchased separately.
ASUS M5A78L-M/USB3
CPU_FAN
CHA_FAN
COM1
PIN 1
1-27