Nvidia nForce 550 MCP User Manual page 21

(2) Line-Out/MIC Header for Front Panel (9-pin): AUDIO
These headers connect to Front Panel Line-out, MIC connector with cable.
Without installing the cable, this header default setting is 5-6 short, 9-10 short. When
you install the cable， you should take off these jumpers.
(3) USB Port Headers (9-pin) : USB1/USB2/USB3
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.
(4) Speaker connector: SPEAK
This 4-pin connector connects to the case-mounted speaker. See the figure below.
(5) 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.
(6) IDE Activity LED: HD LED
This connector connects to the hard disk activity indicator light on the case.
(7) 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
below.
AUDIO
2
Pin 1
Line-Out, MIC Headers
USB1 USB2
Pin 1 Pin 1
life of the system's power supply. See the figure
i23
10
9
USB3
Pin 1
USB Port Headers