Rosewill RC-230 PCI Express 4 Ports SATA III HDD Controller Card External Connector: 2 x eSATA (RC-230 supports enabling of 4 Ports) Internal Connectors: 4 x SATA III (RC-230 supports enabling of 4 Ports) Interface: 2 x PCI-Express Transfer Rate: Up to 6Gb/s RAID: RAID 0/1/0+1, HyperDuo Operating Systems Supported: Windows 8, 7, 2008 R2, Vista, XP (32 / 64 bit), and Linux 2.6.x and above Hot plug and Hot Swap