Add 4 internal sata iii 6gbps ports to a computer through a pci express x2 slotr r leverage ssd performance and standard hdd capacity with hyperduo technologyr maximize system capability with sata iii connection speedsr fit any standard or low profile chassis with included bracketsr r the pexsat34rh 4 port pci express 20 sata controller card with hyperduo adds 4 ahci sata iii ports to a computer through a pcie slot x2 delivering multiple internal 6gbps connections for high performance hard