Bus Type: PCI Express x8 (8 Lane)Connects up to 4 external SATA II devicesAlso compatible with 1.5Gbps SATA 1.0a drivesSpeed: Up to 3Gbps for each channel Port Multiplier and NCQ (Native Command Queuing) supportSupports RAID levels 0,1, 0+1, 5 and JBODSupplied with standard and low-profile backplates Connector: SATA 4x Multilane Infiniband (screw type)Software compatibility: 32/64 bit support for Windows 2000/XP/Vista/Windows 7/Server 2003, 2008 , Linux, Supports \'Non booting\' drivers up to Mac OS v.10.62 Year warranty