SYBA SI-PEX40072 4 Internal + 4 External, 8 Ports PCI-Express x2 Slot, Specification V2.0 Interface SATA-3 Controller Card External Connectors: 4 x eSATA 6.0Gb/s Internal Connectors: 4 x SATA 6.0Gb/s Transfer Rate: Up to 6Gb/s RAID: Non-RAID controller Operating Systems Supported: Windows 8/ Windows 7/ Vista/ Windows XP Server 2003/ Server 2008 R2 Linux 2.6x and Above Mac OS 10.X Package Contents: x1 SATA III (6Gbps) 8-port PCI-Express Controller Card x1 User Manual x4 SATA Cables (18) x1 Driver CD