USB 3.0 (xHCI)

USB : Universal Serial Bus

AHCI : Advanced Host Controller Interface. 

OHCI / UHCI : 

• Open Host Controller Interface (OHCI)
• Intel Universal Host Controller Interface (UHCI)

     (USB 1.0 : 1.5 Mbps and 12 Mbps)

EHCI : 

• Intel Enhanced Host Controller Interface (EHCI)

    (USB 2.0 : 480 Mbps)

XHCI : 

• Intel eXtensible Host Controller Interface (xHCI)

    (USB 3.0 : 5 Gbps)