ITEM NAME:Super Speed 2-Port USB 3.0 PCI-E PCI Express 19-pin USB3.0 15-pin SATA Conn M7O2 Super Speed 2-Port USB 3.0 PCI-E PCI Express 19-pin USB3.0 15-pin SATA Conn M7O2 Extend with 2 USB 3.0 downstream ports and 1 USB3.0 19-pin Connector(can expand another two USB 3.0 ports) for standard desktop PC. Fully compliant with one-lane (x1) PCI Express 2.0 specification. TWO external 5Gbps Super Speed USB 3.0 ports. Colour: Black System Support: Windows XP / Vista / Windows7 (32/64 bit)/Windows8 (32/64 bit). Note: To achieve the maximum throughput, the PCI-Express slot must be version 2.0 or higher. Performance per port may decrease if multiple ports are transferring data simultaneously due to limited throughput of the PCI-Express slot. To meet USB 3.0 transfer speed, high quality USB 3.0 cables and devices are required. Supports both 32-bit & 64-bit OSes. Make sure the power is well connected; otherwise you will see a "Power Surge on Hub Port" message error and no 5V bus power in USB ports. Support LINUX. Item size: 12 * 8cm / 4.7 * 3.1in Item weight: 48g / 1.7oz Material: Aluminum + Glass Plate Package Included: 1 x PCI Express card 1 x Low Profile Bracket 2 x Screws 1 x Software Drivers CD 1 x User Manual Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.