Comply with PCI Express dual channel (X2) basic specification Revised Edition 2.0. Conforming to universal serial bus 3.1 specification Gen2. Conforming to the USB connection SCSI protocol revision 1.0. Compatible xHCI (extensible host controller interface) Specification Revision 1.1. Support simultaneous operation of multiple USB 3.0, USB 2.0 and USB 1.1 devices