5.CPU and Chassis Fan Connectors (3-pin CPU_FAN1, CHA_FAN1)

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_FAN1

GND

+12V

Rotation

CHA_FAN1

GND

+12V

Rotation

P4BGL-VM

P4BGL-VM 12-Volt Cooling Fan Power

6.Chassis open 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.

If you do not wish to use the chassis intrusion lead, place a jumper cap over the pins labeled “Chassis Signal” and “Ground” to close the circuit.

P4BGL-VM

CHASSIS

+5VSB MB

Chassis Signal GND

P4BGL-VM Chassis Alarm Lead

ASUS P4BGL-VM motherboard user guide

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