Features: 1.Chip: Use Taiwan VL805 USB3.0 high performance main control chip, which makes the operation more stable, compatible, and product performance is greatly improved. Standard PCI?E X1 contact, compatible with X4/X8/X16 slots. 2.Applicability: The expanded 2 USB3.0 ports allow you to expand more external USB devices. Support for Windows /for OS/for Linux and other systems. 3.Support Hot Plug: Plug and play, quickly expand 2 USB3.0 ports for the computer, and can link 2 devices at the same time. 4.Power Supply: The product uses SATA 15Pin power supply, which can easily run large capacity devices and transfer large data files. 5.Stability: The product uses full capacitance, which not only enhances the product's anti?interference ability, but also greatly improves the stability of data transmission. specification:Item Type: Usb 3.0 Pcie Card Product Material: PCB Model: PH63 Input Interface: PCI-E X1 Compatible: X4/X8/X16 USB 3.0 Faster Transmission Speed, Theoretical 5GB/S is 10 Times Faster Than USB2.0 Theoretical 480MB/S Backward Compatibility: USB2.0 and USB1.1 PackageList: 1 x Riser Card 1 x Screw