9.CPU, chassis, and power fan connectors(4-pin CPU_FAN, 3-pin CHA_FAN1, 3-pin CHA_FAN2, 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. Insufficient air flow inside the system may damage the motherboard components. These are not jumpers! Do not place jumper caps on the fan connectors!

P5K

P5K Fan connectors

CPU_FAN

GND

PWR FAN CPU

IN FAN CPU

PWM FAN CPU

PWR_FAN

GND +12V Rotation

CHA_FAN1

Rotation +12V GND

CHA_FAN2

GND +12V Rotation

Only the CPU-FAN and CHA-FAN 1-2 connectors support the ASUS Q-FAN 2 feature.

10.Serial port connector (10-1 pin COM1)

This connector is for a serial (COM) port. Connect the serial port module cable to this connector, then install the module to a slot opening at the back of the system chassis.

COM1

PIN 1

P5K

P5K COM port connector

The serial port module is purchased separately.

2-34

Chapter 2: Hardware information