... Host ControllerInter This is a 2 Port USB 3.0 PCI Express Card which complies with USB 3.0 Specification, and ... Host Controller Interface (xHCI). It has PCI Express® bus interface, and it is applicable for PCI Express solution for host PC system. It ... low speed 1.5Mbps.2,Compliant with Intel’s extensible Host Controller Interface (xHCI) Specification revision 0.953,Compliant with PCI Express® Base ...