Features: Compliant with PCIE5.0 standard, theoretical transfer speed up to 128Gbps, measured read speed up to 10,000MB. Adopts double-sided metal strips and multiple hole hollowed structure to improve heat dissipation efficiency. Support nvme hard disk, backward compatibles pcie4.0/3.0/2.0 slots. Enhances the performances of the hard disk to meet the video, design work to make the computer run smoothly efficiently. Strong compatibility, easy to install, no need for additional driver, enhances the flexibility and scalability of the storage device. Widely used in enterprises-class servers, workstations, and high-end computer to meet data processing needs. Specifications: Name: Pcie5.0X4 to NVMe Adapter Size:about 144X89MM/5.67x3.5in Support：Solid Disk Adapter Backward Compatibles pcie4.0/3.0/2.0 slots Transfer Speed up to 128Gbps, Measured Read Speed up to 10,000MB/s Package Includes: 1PC Pcie5.0X4 to NVMe Adapter note: Due to the problemsof lighting effects, there will be tolerances in product, please understand. Please allow 0-1cm error due to manual measurement