4x USB3.0 Ports - Add four USB 3.0 ports to your to your PCIE-enabled desktop easily with PCI Express to USB3.0 Controller Adapter. Each interface owns individual 2A power supply, 4 interfaces work independently of each other, total 8A. No additional power cord is required. High Speed USB 3.0 - Max 5Gbps transmission speed, 4 USB 3.0 ports can work at the same time. Downwards compatible with USB2.0. 5 Gbps is shared by 4 downstream ports. Fully ProtectionEach interface has separated insurance, with over current & short circuit protection. Protect your devices and computer. Stable & Faster - 4 conductive polymer material capacitors to ensure a more stable power supply of each interface. Enjoy copying movies, data files, music, photos between USB devices and the computer at a faster speed. Wide Compatibility - Support PCIE X1 / X4 / X8 / X16 slot. The WIN7/8/10 & Linux system is plug-and-play, no driver installation is required. Win XP need to install drive