Bus Type: 32 bit, 33/66 MHz fully compliant PCI host interface Data transfer rate: up to 3 Gbit/sec Backward compatible to Serial ATA 1.0a specifications Port Multiplier and NCQ (Native Command Queuing) support Supports Raid functions 0, 1, 5 and 10 (Optional, driver included) Hot plugging support Internal Connector: 4 x SATA II Female Supports 4 independent SATA channels Chipset: Silicon Image SIL3124-2 Software Compatibility: Win 2000/NT4.0/XP/Vista/7/Server 2003, 2008; Mac OSX10.6 ~ Snow Leopard(non-RAID) and Linux