Asus M4A78LT-M LE - Page 38

10. CPU and chassis fan connectors (4-pin CPU_FAN and 3-pin CHA_FAN)
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, ensuring that the black wire of each cable matches the ground pin of the
connector.
Only the 4-pin CPU fan connector supports the ASUS Q-Fan feature.
DO NOT forget to connect the fan cables to the fan connectors. Insufcient air ow inside
the system may damage the motherboard components. These are not jumpers! DO NOT
place jumper caps on the fan connectors.
M4A78LT-M LE
M4A78LT-M LE 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 LE
M4A78LT-M LE Serial port (COM1) connector
Chapter 1: Product introduction1-28
E5032_M4A78LT-M LE.indb 28 9/25/09 2:32:06 PM