Bus Type 64 Bit PCI-X Speed: Up to 3Gbit/sec Backwards compatible with SATA-150 devices Port Multiplier and NCQ (Native Command Queuing) support Supports RAID levels 01 0+1 5 and JBOD Supplied with standard and low-profile backplates Internal Connector: 4 x SATA II Female Software Compatibility: Windows 2000/XP/Vista and 2003 Server 2 Year warranty