Features: The PCIExpress3.0 SATA3 6Gbps Expansion Card features multiple SATA3 6Gb/s channel host controllers to bring server-class functionality to the desktop. The motherboards supports the use of the industry's newer, faster 6Gb hard disk while providing backward compatibility with SATA3 1.5Gb/s or 3Gb/s disk. It will improve performances for every type of computer user. Each PCIExpress2.0 channel provides up to 500MB of throughput. PCIe Features Compliant with PCIe 3.0 specification. X1-lane. 2.5 Gbps and 5.0 Gbps communication speeds. Supports AHCI programming interfaces registers for SATA3 controllers. Specifications: Item: PCIExpress3.0 to 5 Port SATA3.0 Expansion Card Speed: Sata3 6Gb/s Support 4U Chassis 120mm/4.72in 2U Chassis 80mm/3.15in Package Includes: 1PC PCIExpress3.0 to 5 Port SATA3.0 Expansion Card note: Due to problem of lighting,there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurement