AMD Athlon 64 User Manual page 28

Installation
CUSB3 CUSB4
Page 3-12
CUSB3/CUSB4: Four USB 2.0 ports
USB2.0 allows data transfer speed up to 480Mbps.
This mainboard includes 4 additional USB2.0 ports,
identified by two 10-pin connector.
If you wish to use the additional USB ports, a USB2.0
extension cable is optionally provided. Insert its cables
to this 10-pin connector.
You may purchase separately a USB
extension cable. Ensure the USB cable has
the same pin assignment, a different pin
assignment may cause damage to the
system. Please contact your retailer.
CAUTION !