PCI-E to 4 USB3.0 Ports Expansion Card PCI Express to USB3.0 Adapter Card with Large 4Pin Power Interface for Desktop PC Features: Extends USB3.0 interface on PC with PCI-Express slot. USB 3.0 output ensures fast transfer rate up to 5Gbps that is much higher than USB2.0. Comply with USB3.0 interface specification, compatible with USB 2.0, 1.1. Adopt VL805 USB3.0 main control chip, it has better stability and compatibility than ordinary chips. Built-in A-level voltage stabilizing components, enhance the conservation of power supply voltage stability, intelligent and fast, reduce power loss, ensure high-speed and stable data transmission. Use high performance and electronic components, low impedance, high stability and high temperature resistance, ensure the safe operation of the machine. Easy installation, plug and play, convenient and efficient. Specification: Item name: Expansion card Support system: Windows XP/Vista/Win7,Win8,Win 10,etc. Item size: 12 * 8 * 2cm /4.72 * 3.15 * 0.79in(L * W * H) Item weight: Approx.48g /1.69oz Package weight: 52g /1.83oz Package list: 1 * Expansion card