ASRock Z97M OC Formula User Manual - Page 30
Chassis and Power Fan, pin CPU_FAN1
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Z97M OC Formula Chassis and Power Fan Connectors (4-pin CHA_FAN1) (see p.7, No. 19) (3-pin CHA_FAN2) (see p.7, No. 26) (3-pin PWR_FAN1) (see p.7, No. 27) CPU Fan Connectors (4-pin CPU_FAN1) (see p.7, No. 3) (3-pin CPU_FAN2) (see p.7, No. 2) ATX Power Connector (24-pin ATXPWR1) (see p.7, No. 6) FAN_SPEED_CONTROL CHA_FAN_SPEED +12V GND Please connect fan cables to the fan connectors and match the black wire to the ground pin. GND FAN_VOLTAGE CHA_FAN_SPEED 4 3 21 GND +12V CPU_FAN_SPEED FAN_SPEED_CONTROL GND FAN_VOLTAGE CPU_FAN_SPEED 12 24 1 13 This motherboard provides a 4-Pin CPU fan (Quiet Fan) connector. If you plan to connect a 3-Pin CPU fan, please connect it to Pin 1-3. This motherboard provides a 24-pin ATX power connector. To use a 20-pin ATX power supply, please plug it along Pin 1 and Pin 13. ATX 12V Power Connector (8-pin ATX12V1) (see p.7, No. 1) 8 5 This motherboard pro- vides an 8-pin ATX 12V 4 1 power connector. To use a 4-pin ATX power supply, please plug it along Pin 1 and Pin 5. PCIe Power Connector (4-pin PCIE_PWR1) (see p.7, No. 24) GND +12V DETECT Please connect a 4 pin molex power cable to this connector when more than three graphics cards are installed. 23 English