ASRock A780FullDisplayPort User Manual - Page 31

CPU Fan Connector (4-pin CPU_FAN1) (see p.13 No. 4) Please connect the CPU fan 1 GND 2 +12V 3 CPU_FAN_SPEED cable to this connector and 4 FAN_SPEED_CONTROL 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.13 No. 3) 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 (4-pin ATX12V1) (see p.13 No. 2) Serial port Header (9-pin COM1) (see p.13 No.35) IEEE 1394 Header (9-pin FRONT_1394) (see p.13 No. 26) RRXD1 DDTR#1 DDSR#1 CCTS#1 1 RRI#1 RRTS#1 GND TTXD1 DDCD#1 RXTPAM_0 GND RXTPBM_0 +12V GND 1 +12V RXTPBP_0 GND RXTPAP_0 Please note that it is necessary to connect a power supply with ATX 12V plug to this connector. Failing to do so will cause power up failure. This COM1 header supports a serial port module. Besides one default IEEE 1394 port on the I/O panel, there is one IEEE 1394 header (FRONT_1394) on this motherboard. This IEEE 1394 header can support one IEEE 1394 port. 31