The 4-Port (2 Internal/2 External) PCIe SATA 6 Gb/s Controller Card from StarTech adds 2 internal or external SATA ports to your computer through a single PCIe (x1) card slot. The card features on-board jumper selection, which enables you to configure the card to provide 2 internal or external SATA III ports, or one of each, as required.The SATA III card features Port Multiplier (PM) support on each port, which allows multiple drives to be connected over a single cable when necessary. The card is fully compliant with the SATA revision 3.0 specification (up to 6 Gb/s of data bandwidth), enabling you to utilize the speeds of high-performance hard drives and solid state drives (SSD), as well as SATA-based optical drives (CD-ROM, DVD-ROM, Blu-Ray).