Asus M3A78-EMH HDMI User Manual - Page 47

pin CPU_FAN, 3-pin CHA_FAN1 - support cpu

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5. CPU and Chassis Fan connectors. (4-pin CPU_FAN, 3-pin CHA_FAN1) The fan connectors support cooling fans of 350mA~740mA (8.88W max.) or a total of 1A~2.22A (26.64W 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. Only CPU Fan supports Q-Fan. CHA_FAN Rotation +12V GND M3A78-EMH HDMI CPU_FAN CPU FAN PWM CPU FAN IN CPU FAN PWR GND M3A78-EMH HDMI Fan Connectors 6. Serial port connector (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. M3A78-EMH HDMI COM1 PIN1 M3A78-EMH HDMI COM Port Connector ASUS M3A78-EMH HDMI 1-35

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ASUS M3A78-EMH HDMI
1-35
5.
CPU and Chassis Fan connectors
(4-pin CPU_FAN, 3-pin CHA_FAN1)
The fan connectors support cooling fans of 350mA~740mA (8.88W max.) or
a total of 1A~2.22A (26.64W 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.
Only CPU Fan supports Q-Fan.
M3A78-EMH HDMI
M3A78-EMH HDMI Fan Connectors
CPU_FAN
GND
CPU FAN PWR
CPU FAN IN
CPU FAN PWM
CHA_FAN
GND
Rotation
+12V
6.
Serial port connector (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.
M3A78-EMH HDMI
COM Port Connector
PIN1
COM1
M3A78-EMH HDMI