Serial ATA (SATA) is the latest form of computer connectivity, featuring faster transfer speeds, easier configuration, and the ability to hot swap drives. With the Vantec SATA/eSATA PCI Host Controller, you can add the features and functionality of eSATA to your computer. By providing an internal SATA port, the PCI Host Card offers the expandability to add a hard drive to you system. With the external SATA port, both the PCI Host Card gives the flexibility of adding a high-speed connection to an external hard drive.