AMD SB750, 790GX user manual Headers

2-6-2 Headers

(1) Line-Out/MIC Header for Front Panel (9-pin): AUDIO

These headers connect to Front Panel Line-out, MIC connector with cable.

Audio-GND Audio-JD MIC2-JD KEY LINE2-JD

AUDIO 2

Pin 1

-L	-R	-R	FB -L
MIC2	MIC2	Lineout2	Sense- Lineout2

10

9

Line-Out, MIC Headers

(2) USB Port Headers (9-pin): USB1/USB2/USB3/USB4

These headers are used for connecting the additional USB port plug. By attaching an option USB cable, your can be provided with two additional USB plugs affixed to the back panel.

USB1

Pin 1

VCC -DATA +DATA GND OC

VCC -DATA +DATA GND

USB2

Pin 1

VCC -DATA +DATA GND OC

VCC -DATA +DATA GND

USB3	VCC	-DATA +DATA GND	OC	USB4	VCC	-DATA +DATA GND	OC
Pin 1				Pin 1
	VCC	-DATA +DATA GND			VCC	-DATA +DATA GND

USB Port Headers

（3)Speaker connector: SPEAK

This 4-pin connector connects to the case-mounted speaker. See the figure below.

(4) Power LED: PWR LED

The Power LED is light on while the system power is on. Connect the Power LED from the system case to this pin.

(5) IDE Activity LED: HD LED

This connector connects to the hard disk activity indicator light on the case.

(6) Reset switch lead: RESET

This 2-pin connector connects to the case-mounted reset switch for rebooting your computer without having to turn off your power switch. This is a preferred method of rebooting in order to prolong the lift of the system’s power supply. See the figure below.

(7)Power switch: PWR BTN

This 2-pin connector connects to the case-mounted power switch to power ON/OFF the system.

16