AMD SB750, 790GX user manual HDMI-SPDIF Out header Spdif Out

IR	GND	IRRX
	2
Pin 1
	NC	VCC5 IRTX

6

5

IR infrared module Headers

(11)Serial COM Port header: COM1

COM1 is the 9-pin block pin-header. The On-board serial port can be disabled through BIOS SETUP. Please refer to Chapter 3 “INTEGRATED PERIPHERALS SETUP” section for more detail information

Pin1

Serial COM Port 9-pin Block

(12) HDMI-SPDIF Out header: SPDIF Out

The SPDIF output is capable of providing digital audio to external speakers or compressed AC3 data to an external Dolby digital decoder. Use this feature only when your stereo system has digital input function. Some of the VGA Card need connect SPDIF-IN Connector，so its HDMI Port can make sounds .

HDMI_SPDIF_OUT

SPDIF

GND

1 2

18