PCIE X16 full bandwidth 4.0, GEN4 protocol, compatible with gen3/gen4.The motherboard BI0S needs to support changing the PCIE working mode.Gold finger immersion gold process, increase the gold thickness to 5U.Use Slim sas8i connector.With 1 minute 4 clock split IC.With power-on LED indicator.Dwarf PCB design to minimize the size.Support 2-port 4-port to nvme solid state drives.This product is a third- accessory, and there is no that all configurations reach Pcie 4.0 and there is no that it be compatible with all motherboards, graphics cards, extension cables, and systems.Note:Due to different production batches, there are differences in printing/appearance, which does not affect use.Colour:BlackMaterial:PCBPackage Contents:2 * adapter card1 * adapter boardOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.