The U31X2-PCIE4XG321 is a Dual Channel 4-port (Type-C) USB 3.2 Gen 2 (10Gbps) to PCI Express x4 Gen 3 Host Adapter.

U31X2-PCIE4XG321 is designed with Two key components.

12-Lane, 5-Port PCI Express Gen 3 Switch.

PCI Express to USB 3.2 Single Chip Host Controller (Asmedia ASM3142, USB IF TID 5080000010)

Utilizing the standard PCI Express Switch, the 12-Lane/5-Port PCI Express Switch provides the most efficient fan-out solution for integrating four PCI Express to USB 3.2 Gen 2 Single Chip Host controllers into a small board design. Each USB 3.2 to PCI Express Single Chip Host controller takes advantages of 10 Gbps burst rate of 4-lane PCI Express bus in both directions and is fully compliant with PCI Express Base specification r3.0. This solution provides full PCI Express and USB 3.2 functionality and performance.