SuperSpeed USB 3.1 with Type A and Type C ports PCI-E Gen2.0 x2, throughput up to 10 GT/s Compliant with eXtensible Host Controller Interface (XHCI) specification Revision 1.1 Compliant with USB Attached SCSI Protocol Revision 1.0 (UASP) Includes optional low profile slot cover for supporting low profile cases