Koutech Dual Channel SATA 6Gb/s PCI Express (x1) (2xInt) Compliant with one-lane PCI Express specifications (PCIe x1 slot) and with 5Gb/s PCI Express 2.0 specifications Two (2) channels - Two (2) 6.0Gbps SATA III ports and two (2) internal SATA III connectors Compliant with Serial ATA 2.6 specifications and supports all SATA, SATA II, SATA III devices at 1.5/3.0/6.0 Gbps Supports hard disk drive size at 3 TB or higher and 48-bit LBA mode which can break capacity limit to support hard disk drive larger than 137GB in one partition Fully Plug-N-Play and Hot-Swap compatible and supports 32-bit & 64-bit Windows XP/Server 2003/Vista/Server 2008/Windows 7/Windows 8