Asrock 770 extreme3 用户手册

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20-Pin ATX Power Supply Installation

       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.

Serial port Header

This COM1 header supports a

(9-pin COM1)

                                                                  serial port module.

(see p.10  No.28)

CCTS#1

DDSR#1

DDTR#1

RRXD1

DDCD#1

TTXD1

GND

RRTS#1

RRI#1

1

ATX 12V Power Connector

Please connect an ATX 12V

(8-pin  ATX12V1)

power supply to this connector.

(see p.10  No. 3)

4-Pin ATX 12V Power Supply Installation

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.

HDMI_SPDIF Header

HDMI_SPDIF header, providing

(3-pin HDMI_SPDIF1)

SPDIF audio output to HDMI VGA

(see p.10  No. 31)

card, allows the system to
connect HDMI Digital TV/
projector/LCD devices. Please
connect the HDMI_SPDIF
connector of HDMI VGA card to
this header.

1

GND

+5V

SPDIFOUT