Asus M2V-X - Manual (Page 43)

ASUS M2V-X 2-21
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.
. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB)
ports are available for connecting USB 2.0 devices.
9. S/PDIF coaxial out port. This port connects to external audio output
devices with coaxial cable connectors.
10. PS/2 keyboard port. This purple connector is for a PS/2 keyboard.