Asus M3N-H HDMI - Manual (Page 58)

2-34 Chapter 2: Hardware information
12. Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF)
port(s). Connect the S/PDIF Out module cable to this connector, then install
the module to a slot opening at the back of the system chassis.
The S/PDIF module is purchased separately.
M3N-H/HDMI
®
M3N-H/HDMI Digital audio connector
+5V SPDIFOUT GND
SPDIF_OUT
13. Video Graphics Adapter (VGA) connector (16-pin VGA)
This connector is for the onboard VGA connection, allowing you to connect
a display device to your system. Connect the VGA Out module cable to this
connector, then install the module to a slot opening at the back of the system
chassis.
M3N-H/HDMI
®
M3N-H/HDMI Onboard VGA connector
For easier VGA module installation,
install the VGA module to an expansion
slot below the discrete graphics card.
Graphics card
VGA module