ASRock G41M-VS3 R2.0 User Manual - Page 23

Chassis Speaker Header (4-pin SPEAKER 1) (see p.11 No. 14) Chassis Fan Connector (3-pin CHA_FAN1) (see p.11 No. 16) 1 SPEAKER DUMMY DUMMY +5V GND +12V CHA_FAN_SPEED Please connect the chassis speaker to this header. Please connect a chassis fan cable to this connector and match the black wire to the ground pin. CPU Fan Connector (4-pin CPU_FAN1) (see p.11 No. 3) +12V CPU_FAN_SPEED GND FAN_SPEED_CONTROL 1 2 3 4 Please connect a 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 (24-pin ATXPWR1) 12 (see p.11 No. 4) Please connect an ATX power 13 supply to this connector. 1 Though this motherboard provides 24-pin ATX power connector, it can still work if you adopt a traditional 20-pin ATX power supply. To use the 20-pin ATX power supply, please plug your power supply along with Pin 1 and Pin 13. 24 13 20-Pin ATX Power Supply Installation 12 1 ATX 12V Connector (4-pin ATX12V2) (see p.11 No. 2) Serial port Header (9-pin COM1) (see p.11 No. 25) RRXD1 DDTR#1 DDSR#1 CCTS#1 1 RRI#1 RRTS#1 GND TTXD1 DDCD#1 Please note that it is necessary to connect a power supply with ATX 12V plug to this connector so that it can provides sufficient power. Failing to do so will cause the failure to power up. This COM1 header supports a serial port module. 23