Features: Mainboard need to support PCIE X4X4X4X4X4 split,OCulink SFF-8612 external port Support PCle4.0, backward compatibles PCle3.0 & PCle2.0;Uplinks PCle 4.0 X16 total bandwidth 256Gbps, downlink PCle 4.0X4 64Gbps 4 Port. High-speed transmission, strong stability, easy to install and use Suitable for users who need to expand their storage and graphics cards. Can be used in desktop computers, workstations and other devices, providing more storage space and strong graphics processing capabilities to meet users' needs for highly performances. Specifications: Item：PCIE X16 to SFF8612 Expansion Card Size:about 130X120MM/5.12x4.72in Support: PCle4.0 and backwards PCle3.0&PCle2.0 Need mainboard support: PCIE X4X4X4X4 Split Package Includes: 1PC PCIE X16 to SFF8612 Expansion Card note: Please allow 0-1cm error due to manual measurement. pleasemake sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color Thank you!