19/20 Pin USB 3.0 Female To 9 Pin USB 2.0 Male Motherboard Header Adapter Cord
O r 1 Male to female + female to male 1 pair. You can connect the new USB 3.0 20pin motherboard to an old USB 2.0 device such as an optical drive panel, floppy drive panel. or 1 20pin Male to 9pin Female cable.