5.CPU and Chassis Fan Connectors (3-pin CPU_FAN, PWR_FAN)

The fan connectors support cooling fans of 350mA (4.2 Watts) or a total of 1A (12W) at +12V. Connect the fan cable to the connector matching the black wire to the ground pin.

Do not forget to connect the fan cables to the fan connectors. Lack of sufficient air flow within the system may damage the motherboard components. These are not jumpers! DO NOT place jumper caps over the fan connectors! Doing so will damage the motherboard.

 

CPU_FAN

 

Rotation +12V GND

 

PWR_FAN

 

Rotation

 

+12V

P4B533-M

GND

P4B533-M 12-Volt Cooling Fan Power

6.Chassis alarm lead (4-1 pin CHASSIS)

This lead is for a chassis designed with intrusion detection feature. This requires an external detection mechanism such as a chassis intrusion sensor or microswitch. When you remove any chassis component, the sensor triggers and sends a high-level signal to this lead to record a chassis intrusion event.

By default, the pins labeled “Chassis Signal” and “Ground” are shorted with a jumper cap. If you wish to use the chassis intrusion detection feature, remove the jumper cap from the pins.

P4B533-M

CHASSIS

+5VSB MB

Chassis Signal GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P4B533-M Chassis Alarm Lead

ASUS P4B533-M motherboard user guide

2-23