Asus P8H67-M2 SI User Manual - Page 21
P8H67-M2/TPM/SI Chassis intrusion connector
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2. CPU and chassis fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN) Connect the fan cables to the fan connectors on the motherboard, ensuring that the black wire of each cable matches the ground pin of the connector. CPU_FAN CPU FAN PWM CPU FAN IN CPU FAN PWR GND P8H67-M2/TPM/SI CHA_FAN GND +12V Rotation P8H67-M2/TPM/SI Fan connectors 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! 3. 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 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. CHASSIS P8H67-M2/TPM/SI P8H67-M2/TPM/SI Chassis intrusion connector +5VSB_MB Chassis Signal GND Chapter 1: Product introduction 1-11