Add 4 Internal SATA III (6 Gbps) ports to a computer through a PCI Express x 2 slot Leverage SSD performance & 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 (x 2), delivering multiple internal 6 Gbps connections for high-performance hard drives & 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 & large capacity of standard hard drives. By combining SSD & HDD drives into a single volume (up to 3 SSD + 1 HDD), Hyper Duo discreetly works in the background to identify & move frequently accessed files to the faster SSD drive (s) for enhanced data throughput Â- up to 80% of SSD performance! (Note: The Hyper Duo automatic storage tiering feature is compatible with Windows® XP, Vista, 7 & 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, & 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. WhatÂ’s in the box PCIe SATA Controller Card Low Profile Bracket Driver CD Instruction Manual