HighPoint RocketU 1142A PCI-Express 2.0 x4 USB 3.0 SuperSpeed HBA External Connectors: 2 x USB3.0 Internal Connectors: 1 x 20-pin USB 3.0 Transfer Rate: 20Gb/s Transfer Bandwidth Dimensions: 5.11 x 2.69 x 0.06 Operating Systems Supported: Driver support for: Microsoft Windows 7, 2008 and Vista Linux OS support with xHCI driver of Kernel v2.6.31 or later Package Contents: RocketU 1142A USB 3.0 HBA CD (Driver software) Quick Installation Guide