The PCI Express USB 3.0 (with SATA) PCI) PEXUSB3S4V allows you to add 4 USB 3.0 ports to any computer equipped with PCI Express with transfer speed support up to 5 Gbps, while remaining compatible backwards with USB 2.0/1.x devices. Up to 70% faster than the traditional USB 3.0 if used in combination with an external box with UASP support (Note: UASP requires a compatible operating system). Using a more effective protocol than the normal Bot class USB (Bulk-Only Transport), UASP technology optimizes transfers allowing the processing of multiple controls simultaneously, significantly increasing transfer speeds and reducing waiting time during data transfers. For more details, consult the results of our tests on UASPs below. The card uses a "vertical" layout in which the ports are arranged one on the other so that all four USB 3.0 ports are addressed outside and while allowing the insertion of the card into a computer with a reduced/low profile factor using the low -profile bracket included. Inolter, thanks to the integrated SATA power supply connector, each USB port is able to provide up to 900 but to the devices that are powered by the Host bus connection (500 but for USB 2.0) by connecting to the computer's power supply. With 2 -year -old Startech.com guarantee and free -life technical support, optimized thanks to UASPPPORTO by UASP in Windows® 8 and Windows Server 2012. During the tests, UAsp has shown to reach 70% faster performance and the reading 40% faster in writing than the maximum performance of the traditional USB 3.0 technology. Dating the tests with the same peak, UASP also has a reduction of 80% of the necessary processor resources. The test results were obtained using an IVY BRIDGE INTEL® system, USB 3.0 Startech.com USB cards, an additional external box.com Equipped with UAsp and a solid state unit SATA III.