Bus Type: X1 PCI-Express Internal Connector: 2 x SATA II Female Supports RAID levels 0, 1, 0+1, 5, 10 & JBOD Port Multiplier & NCQ (Native Command Queuing) support Supports " Non booting" drivers for Mac OS X v.10.4 Supplied with extra low profile bracket Software compatibility: 32/64 bit support for Windows 2000/XP/ Vista/ Windows 7/8/ Server 2003, 2008, Linux, Supports ' Non booting' drivers up to Mac OS v.10.6 Warranty: 2 years To use RAID 5 function requires an enclosure with a minimum of 3 x HDD & a SATA port Mulitplier, part number 51136.