2-Channel 4-Port SATA III 3.0 PCIe PCI Express Controller Card 6Gbps by Tektrum Engineering Internal Ports: 2x SATA;External Ports: 2x eSATA Fully compliant with Single-lane(x1) PCI Express specification; Reliable ASM1061Chipset is employed Fully compliant with SATA 3.0 interfaces, compatible with SATA 2.0 and SATA 1.0; Data Transfer Rate: Up to 6Gbps Fully Plug & Play and Hot Swap Compatible connect/disconnect devices; Supports 2000/XP/Vista/Win7/Win8