Asus M3N78-EH - Manual (Page 36)

1-24 Chapter 1: Product introduction
10. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports
are available for connecting USB 2.0 devices.
11. USB 2.0 ports 3 and 4. These two 4-pin Universal Serial Bus (USB) ports
are available for connecting USB 2.0 devices.
12. COM port. This port is for pointing devices or other serial devices.
13. PS/2 keyboard port (purple). This port is for a PS/2 keyboard.
Refer to the audio configuration table for the function of the audio ports in 2, 4,
6, or 8-channel configuration.
Audio 2, 4, 6, or 8-channel configuration
Ensure the audio device of Sound playback is Realtek High Definition Audio
(the name may be different based on the OS). Go to Start > Control Panel >
Sounds and Audio Devices > Sound Playback to configure the setting.
Port
Headset
2-channel
4-channel 6-channel 8-channel
Light Blue Line In Line In Line In Line In
Lime Line Out Front Speaker Out Front Speaker Out Front Speaker Out
Pink Mic In Mic In Mic In Mic In
Orange – – Center/Subwoofer Center/Subwoofer
Black – Rear Speaker Out Rear Speaker Ou Rear Speaker Out
Gray – – – Side Speaker Out
8. Microphone port (pink). This port connects a microphone.
9. Side Speaker Out port (gray). This port connects the side speakers in an
8-channel audio configuration.