U31-PCIE2XG321 is a 2-port USB 3.1 Gen-II (10Gbps) to PCI Express x4 (x2 mode) Gen 3 Host Card. U31-PCIE2XG321 is designed with the new generation Universal Serial Bus XHCI host controller, bridging PCI Express to USB3.1 Gen-II, compliant with USB 3.1 Specification Revision 1.0 and Intel eXtensible Hot Controller Interface specification revision 1.1,. U31-PCIE2XG321 supports two USB 3.1 Gen-II (10Gbps) ports and perform trusting high speed bandwidth with PCIe Gen-III x2 supporting. It also supports backward compatible with legacy USB function and devices, compliant with UASP (USB Attach SCSI Protocol) Revision 1.0, supporting the XHCI debug capability.
U31-PCIE2XG321 supports the proprietary driver for Windows 7 and inbox driver for Windows 8.0, Windows 8.1, Windows 10 and various Linux Kernels.