Bus Type: PCIe x8 (8 lane)External Connectors: 4 x eSATA FemaleSupports RAID levels 0, 1, 0+1, 5 and JBODPort Multiplier and NCQ (Native Command Queuing) supportSupports SATA II data transfer rate up to 3 Gbit/s per channel Supports four independent SATA II channelsIntegrated cooling fanOn board jumper to enable or disable the on board SATA BIOSHot Pluggable drive support Silicon image chipset Sil3124 Software Compatibility: Windows 2000/XP/Vista/Windows 7/Server 2003 and Linux, Supports \'Non booting\' drivers up to Mac OS v.10.62 Year warranty