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2-28 Chapter 2: Hardware information
8. CPU and Chassis Fan connectors
(4-pin CPU_FAN, 3-pin CHA_FAN)
The fan connectors support cooling fans of 350 mA ~ 2000 mA (24 W
max.) or a total of 1 A ~ 3.48 A (41.76 W 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.
Only the CPU_FAN connector supports the ASUS Q-Fan feature.
DO NOT forget to connect the fan cables to the fan connectors. Insufcient
air ow inside the system may damage the motherboard components.
These are not jumpers! DO NOT place jumper caps on the fan connectors!
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
replaced. The signal is then generated as a chassis intrusion event.
By default, the pins labeled “Chassis Signal” and “GND” are shorted
with a jumper cap. Remove the jumper caps only when you intend to
use the chassis intrusion detection feature.
P5L 1394
R
P5L 1394
Fan Connectors
CPU_FAN
GND
CPU FAN PWR
CPU FAN IN
CPU FAN PWM
CHA_FAN
GND
Rotation
+12V
P5L 1394
R
P5L 1394
Intrusion Connector
CHASSIS
+5VSB_MB
Chassis Signal
GND
(Default)