ASRock Z77 Extreme4 User Manual - Page 39
Chassis and Power Fan Connectors - fan control
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Power LED Header (3-pin PLED1) (see p.13, No. 19) 1 PLEDPLED+ PLED+ Chassis and Power Fan Connectors (4-pin CHA_FAN1) (see p.13, No. 22) FAN_SPEED_CONTROL GND +12V CHA_FAN_SPEED (3-pin CHA_FAN2) (see p.13, No. 38) (3-pin CHA_FAN3) (see p.13, No. 39) (3-pin PWR_FAN1) (see p.13, No. 4) Please connect the chassis power LED to this header to indicate system power status. The LED is on when the system is operating. The LED keeps blinking in S1/S3 state. The LED is off in S4 state or S5 state (power off). Please connect the fan cables to the fan connectors and match the black wire to the ground pin. CHA_FAN1, CHA_FAN2 and CHA_FAN3 support Fan Control. CPU Fan Connectors (4-pin CPU_FAN1) (see p.13, No. 3) FAN_SPEED_CONTROL CPU_FAN_SPEED +12V GND 1 2 3 4 Please connect the CPU fan cable to the connector and match the black wire to the ground pin. Though this motherboard provides 4-Pin CPU fan (Quiet Fan) support, the 3-Pin CPU fan still can work successfully even without the fan speed control function. If you plan to connect the 3-Pin CPU fan to the CPU fan connector on this motherboard, please connect it to Pin 1-3. Pin 1-3 Connected 3-Pin Fan Installation (3-pin CPU_FAN2) (see p.13, No. 5) GND +12V CPU_FAN_SPEED ATX Power Connector (24-pin ATXPWR1) (see p.13, No. 8) 12 24 Please connect an ATX power supply to this connector. 1 13 39