IO Crest 2 Port USB 3.1 Type A PCIe 2.0 X4 Controller Card Components Other SI-PEX20174 Support two port of USB3.1 Compliant with USB attached SCSI Protocol Revision 1.0 Support USB3.1 and USB2.0 Link power management Support control, bulk, stream, Interrupt, Isochronous transfer Type Up to 10Gbps bandwidth performance with Low latency