Features: Brand new and high quality PCIE X16 full bandwidth 4.0, GEN4 protocol, suitable for gen3\gen4. Using high-density 4-layer circuit board. Using Slim sas8i connector.Using PCIE GEN4 connector. With power-on LED indicator. Adopt step-down and high-current inductor. Support 2-port SFF8654 to convert into a full-bandwidth X16 PCIE. Using the graphics card PCIE 6P power supply port. Support 4 ports, connect 4xnvme hard disk or 4xU2 hard disk. Support to transfer 1 full bandwidth graphics card or two bandwidth graphics cards. Specifications: Material:PCB Size:Approx.4x14cm/1.57x5.5inch Package Includes: 1x 2Port SlimSAS 8i x2 to PCIe4.0 x16 Card Adapter note: 1.This product is a third-party accessory, and it cannot be guaranteed that all configurations can reach Pcie 4.0, nor can it be guaranteed to suitable for all motherboards, graphics cards, extension cable and system. 2.If the product has any uncertain information, please confirm customer service before purchasing. 3.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 4.Due to the difference between different monitors, the picture may not reflect the actual color of the item.