ASRock 4Core1333-FullHD User Manual - Page 29

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 (20-pin ATXPWR1) (see p.12, No. 32) Please connect an ATX power supply to this connector. ATX 12V Connector (4-pin ATX12V1) (see p.12, No. 1) Serial port Header (9-pin COM1) (see p.12 No.25) IEEE 1394 Header (9-pin FRONT_1394) (see p.12 No. 17) 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 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. 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. 29