StarTech.com USB Adapter - PCI Express 2.0 x1 - Plug-in Card - Add four USB 3.0 ports - three external and one internal port - to your computer - 4 Port PCIe USB 3.0 Card - Cost-effective USB 3.0 Adapter Card - Easy to install with native OS support in Windows 8.1 8 and 7 - Standard and low-profile USB card