Belkin SATA II RAID PCI Low Profile - 3 + 1 eSATA ports int (ST125) Expansion module - PCI interface, PCI Low Profile SATA II RAID - 3-port int + 1 eSATA, SATA II PCI card that allows the transfer of files up to 3 Gbps, it has four ports including 1 external (eSATA) with the functions Raid5/10/0/1, Port Multiplier and NCQ (306 055)