This PCIe eSATA/SATA Controller card adds two external Serial ATA (eSATA) ports and four internal SATA ports, allowing users to harness the speed and reliability of Serial ATA drive connections. The SATA controller card supports command-based switching as well as Native Command Queuing ensuring optimum performance from connected Serial ATA drives. The controller card also supports port multiplication, allowing you to connect multi-drive eSATA external storage using a single data connection to the controller card. Designed for reliable performance, StarTech.com"s PCI Express eSATA+SATA controller card is backed by Lifetime Warranty and free lifetime technical support.