ASRock N68C-GS FX User Manual - Page 24
Chassis and Power Fan Connectors - cpu support
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C. Connect Ground (GND) to Ground (GND). D. MIC_RET and OUT_RET are for HD audio panel only. You don't need to connect them for AC'97 audio panel. System Panel Header (9-pin PANEL1) (see p.12 No. 20) PLED+ PLEDPWRBTN# GND 1 DUMMY RESET# GND HDLEDHDLED+ This header accommodates several system front panel functions. Chassis Speaker Header (4-pin SPEAKER 1) (see p.12 No. 19) 1 SPEAKER DUMMY DUMMY +5V Please connect the chassis speaker to this header. Chassis and Power Fan Connectors (3-pin CHA_FAN1) (see p.12 No. 21) GND +12V CHA_FAN_SPEED Please connect the fan cables to the fan connectors and match the black wire to the ground pin. (3-pin PWR_FAN1) (see p.12 No. 25) GND +12V PWR_FAN_SPEED CPU Fan Connector (4-pin CPU_FAN1) (see p.12 No. 2) 4 3 2 1 GND +12V CPU_FAN_SPEED FAN_SPEED_CONTROL Please connect the CPU fan cable to this 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 ATX Power Connector (24-pin ATXPWR1) (see p.12 No. 8) 12 24 Please connect an ATX power supply to this connector. 1 13 24