SATA III 6 Gbps PCI Express Controller Card (2 Usable/Switchable Internal or eSATA Ports) SATA III(6Gbps)/SATA II(3Gbps)/SATA I(1.5Gbps) Compatible Hot Plug-able And Hot Swap-able SATA Port Connections Flexible Ports Configuration (Use 2 Internal/2 External/1 Internal & 1 External) Small Footprint Using Only One 1x PCI-Express Slot Driver Support for Windows XP/Vista/7 and Server 2003/2008