4 Internal SATA 6Gb/s Ports Compatible with SATA 6G, 3G and 1.5G Hard Drives PCI-Express x1 Interface is Compatible with PCI-Express x2, x4, x8, and x16 slots The IOCrest SI-PEX40064 4 port SATA III PCI-e 2 x1 controller card Marvell 88SE9235 chipset adds four SATA III ports to a computer through a PCI-e 2 x1 slot, delivering multiple internal 6Gbps connections for SATA III hard drives and SSDs. With full support for SATA 3 hard drives and data transfer speeds of up to 6 Gbps, the controller card features a native PCI Express single chipset that provides enhanced compatibility, reliability and performance for SATA 600 MB/s storage needs. Box Contains 4 SATA III Ports PCI-e Controller Card User Manual Low Profile Bracket