Asus M4N78 - PRO w/ Athlon II X2 240 User Manual page 36

8. CPU, Chassis, and Power Fan connectors (4 pin CPU_FAN, 3-pin CHA_FAN,
3_pin PWR_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.
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 CPU FAN supports ASUS Q-Fan.
9. Chassis intrusion connector (4-1 pin Chassis)
This connector is for a chassis-mounted intrusion detection sensor or switch. Connect
one end of the chassis intrusion sensor or switch cable to this connector. The chassis
intrusion sensor or switch sends a high-level signal to this connector when a chassis
component is removed or replace. The signal is then generated as a chassis intrusion
event.
By default, the pin labelled "Chassis Signal" and "Ground" are shorted with a jumper
cap. Remove the jumper cap only when you intend to use the chassis intrusion
detection feature.
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