USB 3.0 20PIN female Header Motherboard cable The STC-C061 USB 2.0 9Pin Housing male to Motherboard USB 3.0 20-pin Header male cable features one USB 3.0 20-pin Header male connector and one Pitch 2.54mm 10-Pin Housing, providing a high-quality connection to USB 2.0 peripherals. The USB 2.0 9Pin Housing male to Motherboard USB 3.0 20pin Header male cable Let your USB 3.0 20pin device connect to the USB 2.0 motherboard. This USB pin header cable by STC enables the connection of different USB 3.0 devices through the USB 2.0 pin header of your mainboard.