ASRock Fatal1ty 990FX Professional Quick Installation Guide - Page 33
Please connect an ATX 12V
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ATX Power Connector (24-pin ATXPWR1) (see p.4 No. 11) 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 (8-pin ATX12V1) (see p.4 No. 2) 5 1 8 4 Please connect an ATX 12V power supply to this connector. 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 4-pin ATX power supply, please plug your power supply along with Pin 1 and Pin 5. 5 1 4-Pin ATX 12V Power Supply Installation 8 4 IEEE 1394 Header (9-pin FRONT_1394) (see p.4 No. 33) Serial port Header (9-pin COM1) (see p.4 No.30) 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. This COM1 header supports a serial port module. English 33 Fatal1ty 990FX Professional Series Motherboard