Asus CROSSHAIR Crosshair English Edition User's Manual - Page 57

6. CPU, chassis, and optional fan connectors (4-pin CPU_FAN, 3-pin CHA_REAR_FAN, 3-pin CHA_FRONT_FAN, 3‑pin OPT_FAN1, 3-pin OPT_FAN2, 3-pin OPT_FAN3, 3-pin OPT_FAN4, 3-pin OPT_FAN5) The fan connectors support cooling fans of 350 mA ~ 1000 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! CPU_FAN GND +12V Rotation RPM adjustment OPT_FAN5 OPT_FAN4 Rotation +12V GND CPU_FAN OPT_FAN1 OPT_FAN5 CROSSHAIR OPT_FAN4 OPT_FAN3 CHA__REAR_FAN OPT_FAN1 OPT_FAN2 Rotation +12V GND OPT_FAN2 Rotation +12V GND Rotation +12V GND CHA_FRONT_FAN Rotation +12V GND OPT_FAN3 CHA__FRONT_FAN CHA_REAR_FAN Rotation +12V CROSSHAIR Fan connectors GND Rotation +12V GND 7. 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 "Ground" are shorted with a jumper cap. Remove the jumper caps only when you intend to use the chassis intrusion detection feature. +5VSB_MB Chassis Signal GND CROSSHAIR CHASSIS (Default) CROSSHAIR Chassis intrusion connector ASUS Crosshair 2-31