Supports 2 Ports Serial ATA PHY, 1.5Gbps, 3.0Gbps and 6.0Gbps seed negotiation Supports AHCI and IDE programming interface Supports Native Command Queue (NCQ) Supports port Multiplier Command based switching Embedded hardware RAID Engine Syba' s 2 port SATA 6GB/s PCI-E X1 is a High performance SATA host adapter designed to add two internal serial ATA 6GB/s channels to your PCIe-equipped computer for additional hard disk drive connections. It supports SATA hard disk drives up to 4TB, ATA/ATAPI-7 specification as well as port multiplier. Plus, the SATA controller card offers an effective hardware RAID solution, with native RAID (0, 1, span) support. Includes both a full and low profile/half-height bracket for installation into any size of desktop computer.