CoolGear Internal to External eSATA 4 Port PCI Bracket PCI 4 port SATA adapter Connect Internal host card to external devices. Four internal latching sata connections. Four external eSATA II connections. OS Compatibility: Windows 98, Me, XP, 2000, 2003, CE, Vista, Windows 7, and Windows 8 as well as Linux and Mac OS 10.X