ASUS P5Q-EM DO 1-33
8. CPU, chassis, and power fan connectors
(4-pin CPU_FAN, 3-pin CHA_FAN1, 3-pin PWR_FAN)
The fan connectors support cooling fans of 350 mA ~ 2000 mA (24 W max.) or a total
of 1 A ~ 7 A (84 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.
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!
P5Q-EM DO

P5Q-EM DO fan connectors

PWR_FAN
Rotation
+12V
GND
Rotation
+12V
GND
CHA_FAN1
CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
9. Chassis intrusion connector (4-1 pin CHASSIS)
This connector is for a chassis-mounted intrusion detection sensor or switch. 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 pin labeled “Chassis Signal” and “ Ground” are shorted with a jumper cap.
Remove the jumper caps only when you intend to use the chassis intrusion detection
feature.
P5Q-EM DO
+5VSB_MB
Chassis Signal
GND

CHASSIS

P5Q-EM DO Chassis intrusion connector

Only the 4-pin CPU_FAN connectors support the ASUS Advanced Q-Fan feature. This
motherboard does not support 3-pin CPU fan.
P5Q-EM DO.indb 33 12/9/08 12:34:48 PM