Asus L1N64-SLI WS - Manual (Page 52)

2-0 Chapter 2: Hardware information
10. Internal audio connector (4-pin CD [Black])
These connectors allow you to receive stereo audio input from sound sources
such as a CD-ROM, TV tuner, or MPEG card.
11. Serial port connector (10-1 pin COM1)
This connector is for a serial (COM) port. Connect the serial port module
cable to this connector, then install the module to a slot opening at the back
of the system chassis.
L1N64-SLI
WS
L1N64-SLI WS Internal audio connector
CD
(black)
Right A
udio Channel
Left A
udio Channel
Ground Ground
L1N64-SLI
WS
L1N64-SLI WS COM port connector
PIN 1
COM1