ASRock B450M/ac User Manual - Page 38
pin CHA_FAN2/WP
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Chassis/Water Pump Fan Connectors (4-pin CHA_FAN2/WP) (see p.7, No. 23) FAN_SPEED_CONTROL CHA_FAN_SPEED FAN_VOLTAGE GND 4 This motherboard 3 2 provides one 4-Pin water 1 cooling chassis fan connectors. If you plan to connect a 3-Pin chassis water cooler fan, please connect it to Pin 1-3. CPU Fan Connector (4-pin CPU_FAN1) (see p.7, No. 2) FAN_SPEED_CONTROL CPU_FAN_SPEED FAN_VOLTAGE GND 1 2 34 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. ATX Power Connector (24-pin ATXPWR1) (see p.7, No. 6) 12 24 1 13 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 provides a 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. Chassis Intrusion Header (2-pin CI1) (see p.7, No. 15) 1 GND Signal This motherboard supports CASE OPEN detection feature that detects if the chassis cove has been removed. This feature requires a chassis with chassis intrusion detection design. English 32