Add 4 Internal SATA III (6Gbps) ports to a computer through a PCI Express x2 slot Leverage SSD performance and standard HDD capacity with Hyper Duo technology Maximize system capability with SATA III connection speeds Fit any standard or low profile chassis with included brackets The PEXSAT34RH 4-Port PCI Express 2. 0 SATA Controller Card with Hyper Duo adds 4 AHCI SATA III ports to a computer through a PCIe slot (x2), delivering multiple internal 6Gbps connections for high-performance hard drives and Solid State Drives (SSDs). Featuring Hyper Duo technology, the SATA card offers SSD auto-tiering which lets you balance the performance advantages of SSD storage with the cost-effectiveness and large capacity of standard hard drives. By combining SSD and HDD drives into a single volume (up to 3 SSD + 1 HDD), Hyper Duo discreetly works in the background to identify and move frequently accessed files to the faster SSD drive(s) for improved data throughput - up to 80% of SSD performance! (Note: The Hyper Duo automatic storage tiering feature is compatible with Windows(R) XP, Vista, 7 and 8 only) The PCIe SATA controller card supports Port Multiplier (PM), enabling multiple SATA drives to be connected to one port over a single cable, for a total of 7 drives (Up to 4 drives through PM on one port, and a single drive to the remaining 3 ports). Plus, the SATA controller card offers an effective hardware RAID solution, with native RAID (0, 1, 1+0) support. What\'s in the box PCIe SATA Controller Card Low Profile Bracket Driver CD Instruction Manual