Asus P5GC User Manual - Page 50
CPU, power and chassis fan connectors 4-pinCPU_FAN, 3-pin PWR, FAN, 3-pin CHA_FAN, Chassis intrusion
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8. CPU, power and chassis fan connectors (4-pin CPU_FAN, 3-pin PWR_ 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. 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! P5GC CPU_FAN CPU FAN PWM CPU FAN IN CPU FAN PWR GND PWR_FAN GND +12V Rotation CHA_FAN GND +12V Rotation P5GC.CPU.Fan.Connectors Only the CPU_FAN and CHA_FAN connector support the ASUS Q Fan feature. 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. P5GC CHASSIS +5VSB_MB Chassis Signal GND P5GC.Intrusion.Connector (Default) 2-28 Chapter 2: Hardware information