VANTEC Dual Chip 4-Port Dedicated 5Gbps USB 3.0 PCIe Host Card Model UGT-PCE430-2C External USB Ports: 4x USB Ports Operating Systems Supported: PCI-Express x4, x8 or x16 slots Microsoft Windows XP,7,8,8.1, Server 2012, 2008 R2, 2003, and Linux Kernel 2.6.31 or later USB 3.0 devices preferred to get maximum speed Specifications: Device Support: USB 3.0 Type A (backward compatible with USB 2.0 and 1.1) Ports: 4, USB 3.0 Type A ports Bus Technology: PCI-Express x4 Power Connector: 1 - LP4 (4 pin Molex) or SATA power connector Dimensions: 168 x 69 x 20mm Package Contents: Dual Chip 4-Port Dedicated 5Gbps USB 3.0 PCIe Host Card Low Profile Bracket Driver CD Quick Installation Guide