A cost-effective solution for adding USB 3.0 connectivity to your computer. This 4-port PCIe USB 3.0 card gives you three external ports and one internal port, for the ultimate connection flexibility.Features. Expands your computer connectivity with four extra USB 3.0 ports 3 external, 1 internal. Easy to install with native OS support in Windows 8.1, 8, 7, and Linux kernel 2.6.31 or later. Fits standard or small form-factor computers, low-profile bracket included. Data transfer rates up to 5 Gbps plus UASP support. Backward compatible with USB 2.0 and 1.x devices. Built-in optional SATA power connector provides up to 900mA per USB port. PCIe x1 interface, compliant with PCI Express 2.0 specifications. Bus Type - PCI Express. Card Type - Standard Profile LP bracket incl.. Interface - USB 3.0. Port Style - Integrated on Card. Ports - 4. Maximum Cable Length - 9.8 ft.. Maximum Data Transfer - Rate 5 Gbps. Type and Rate - USB 3.0 - 5 Gbit/s. UASP Support. Connector Type - 1 - PCI Express x1 Male. External Ports 3 - USB 3.0 A 9 pin SuperSpeed Female. Internal Ports 1 - SATA Power 15 pin Plug, 1 - USB 3.0 A 9 pin SuperSpeed Female. OS Compatibility - Windows8 / 8.1 32/64bit, 7 32/64, Vista 32/64, XP 32/64 , Windows Server2012, 2008 R2 , Linux 2.6.31 and up Tested up to 3.5. Dimension - 4.7 H x 3.4 L x 0.7 W in.. Weight - 2.1 oz.