10. 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.
Only the 4-pin CPU fan supports the ASUS Q-Fan feature.
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.
M4A78LT-M PLUS
M4A78LT-M PLUS fan connectors
GND
+12V
Rotation
CHA_FAN
CPU_FAN
GND
CPU FAN PWR
CPU FAN IN
CPU FAN PWM
11. Serial port connectors (10-1 pin COM1)
The connector is for a serial (COM) port. Connect the serial port module cable to the
connector, then install the module to a slot opening at the back of the system chassis.
The serial port bracket (COM1) is purchased separately.
PIN 1
COM1
M4A78LT-M PLUS
M4A78LT-M PLUS Serial port (COM1) connector
Chapter 1: Product introduction
1-28
