ASRock H81 Pro BTC R2.0 User Manual - Page 25
Chassis and Power Fan, pin PWR_FAN1
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Chassis Speaker Header (4-pin SPEAKER1) (see p.6, No. 10) DUMMY SPEAKER 1 +5V DUMMY Please connect the chassis speaker to this header. SPDIF Out Connector (2-pin SPDIF_OUT1) (see p.6, No. 19) 1 GND SPDIFOUT Please connect the SPDIF_OUT connector of a HDMI VGA card to this header with a cable. Chassis and Power Fan Connectors (4-pin CHA_FAN1) (see p.6, No. 8) (3-pin CHA_FAN2) (see p.6, No. 25) (3-pin PWR_FAN1) (see p.6, No. 3) GND +12V CPU_FAN_SPEED FAN_SPEED_CONTROL GND +12V FAN_SPEED Please connect fan cables to the fan connectors and match the black wire to the ground pin. +12V GND PWR_FAN_SPEED CPU Fan Connectors (4-pin CPU_FAN1) (see p.6, No. 2) (3-pin CPU_FAN2) (see p.6, No. 1) CHA_FAN_SPEED This motherboard pro- +12V FAN_SPEED_CONTROL GND vides a 4-Pin CPU fan (Quiet Fan) connector. FAN_SPEED +12V GND 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.6, No. 7) 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. English 20