Asus P9D WS - Manual (Page 43)

ASUS P9D WS 2-25
Chapter 2
3. USB 3.0 connector (20-1 pin USB3_12)
These connectors allow you to connect a USB 3.0 module for additional USB 3.0 front
or rear panel ports. With an installed USB 3.0 module, you can enjoy all the benefits of
USB 3.0 including faster data transfer speeds of up to 5Gbps, faster charging time for
USB-chargeable devices, optimized power efficiency and backward compatibility with
USB 2.0.
4. Parallel port connector (26-1 pin LPT1)
This connector is for a parallel port. Connect the parallel port module cable to this
connector, then install the module to a slot opening at the back of the system chassis.
The USB 3.0 module is purchased separately.