Data speed: 480Mbps for USB 3.0 device.
Let your USB 3.0 20pin device connected the USB 2.0 motherboard.
or Let your USB 2.0 9pin device connected the USB 3.0 motherboard.
The package included two adapters.
1set Reversible USB 2.0 9Pin Housing to Motherboard USB 3.0 20pin Header Female Adapter