ASRock A88M-G/3.1 User Manual - Page 25
ATX 12V Power Connector, Please connect an ATX 12V - cpu support
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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.6 No. 6) 12 24 Please connect an ATX power supply to this connector. 1 13 Though this motherboard provides 24-pin ATX power connector, 12 24 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. 20-Pin ATX Power Supply Installation 1 13 ATX 12V Power Connector 1 (8-pin ATX12V1) (see p.6 No. 1) 5 4 Please connect an ATX 12V power supply to this connector. 8 Though this motherboard provides 8-pin ATX 12V power connector, it can still work if you adopt a traditional 4-pin ATX 12V power supply. To use the 1 4 4-pin ATX power supply, please plug your power supply along with Pin 1 and Pin 5. 4-Pin ATX 12V Power Supply Installation 5 8 Serial port Header (9-pin COM1) (see p.6 No. 24) DDCD#1 TTXD1 GND RRTS#1 RRI#1 1 CCTS#1 DDSR#1 DDTR#1 RRXD1 This COM1 header supports a serial port module. English 20