1, PCIE X16 full bandwidth 4.0, GEN4 protocol, compatible with for gen3/gen4.2, Support multiple riser card arrays.3, using high-density low-impedance 4-layer circuit board.4, using Slim sas8i connector.5, using PCIE GEN4 connector.with power-on LED indicator. Adopt step-down IC and high-current inductor.Dwarf the PCB design and minimize the size.Support 2-port SFF8654 to convert into a full-bandwidth X16 PCIE.using the graphics card PCIE 6P power supply port.Conditions of use: The motherboard BIOS supports pcie splitting.PCIE GEN4 X16 TO SIimSAS 8i x2MODES: (x16) (x8x8) (x4x4x8) (x4x4x4x4)Ultra-small size does not take up server space.Support 4 ports, connect 4xnvme solid state hard disk or 4xU2 hard disk.Support to transfer 1 full bandwidth graphics card or two X8 bandwidth graphics cards.Colour:BlackMaterial:ABSPackage Contents:1 set x PCIe4.0x16 slot adapter board