Bus Type: 32 Bit PCI Internal Connector: 4 x SATA Female Supports RAID levels 0, 1, 0+1, 5 & JBOD Port Multiplier & NCQ (Native Command Queuing) support Compliant with PCI Spec 2.3, 32-bit slot, 5V or 3.3V slot Standard & Low Profile back plates included Software Compatibility: Windows NT/2000/XP/ Vista/ Windows 7/ Server 2003, 2008 & up to Mac OS 10.6 & Linux 2 year warranty