ST551 6Gbps PCIe B+M key to 2 Port SATA 3.0 Card M.2 to dual SATA Adapter

1.Meets PCI Express Base Specification 2.1- lane PCI Express for 2.5 and 5Ghz signaling 3.Two ports Serial ATA PHY for 1.5,3.0 and 6Gbps 4.PCI Express Base Specification Rev. 2.0 5.1-lane PCI Express for 2.5 and 5Ghz signaling 6.Maximum payload up to 128 bytes 7.Serial ATA AHCI spec,Rev.1.3 9.Serial ATA Data transfer rates up to 6Gbps 10.Downstream SATA II.SATA I 11.Support Gen 1m and Gen 2m SATA PHY 12.Support Native Command Queue (NCQ)