1-22 Chapter 1: Product introduction
6. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are
available for connecting USB 2.0 devices.
7. USB 2.0 ports 3 and 4. These two 4-pin Universal Serial Bus (USB) ports are
available for connecting USB 2.0 devices.
8. USB 2.0 ports 5 and 6. These two 4-pin Universal Serial Bus (USB) ports are
available for connecting USB 2.0 devices.
9. COM port. This 9-pin COM1 port is for pointing devices or other serial devices.
10. Optical S/PDIF Out port. This port connects an external audio output device via an
optical S/PDIF cable.
11. PS/2 Keyboard port (purple). This port is for a PS/2 keyboard
Do not forget to connect the fan cables to the fan connectors. Insufcient air ow inside the
system may damage the motherboard components. These are not jumpers! Do not place
jumper caps on the fan connectors!
1.10.2 Internal connectors
1. CPU and chassis fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN)
Connect the fan cables to the fan connectors on the motherboard, ensuring that the
black wire of each cable matches the ground pin of the connector.
Only the 4-pin CPU fan and chassis fan support the ASUS Q-FAN 2 feature.