Compatibility: This PCIe to U.2/ adapter applies to 2.5 inch U.2 SSD and 2.5Inch SSD/HDD up to 6TB capacity. PCIe Lanes: PCIe 4.0 lanes with up to 64Gbps bandwidth, this U.2/ drive to PCI Express X4 expansion card is backward compatible with PCIe 1.0 2.0 3.0, PCI Express physical interface supports PCIE X4/X8/X16 slots. By converting one PCIe X4/X8/X16 slot on the motherboard you could add U.2/ drive to your desktop for storage space expansion. (NOTE: It not fit the PCIe x1 slot) High Speed Transfer: The CPU, PCIe slot of motherboard and U.2 SSD should all be PCIe 4.0 features to reach PCIe 4.0 X4 64Gbps full speed. (Note: PCIe 4.0 is unavailable on 10th Gen and for 3000 or earlier.) OS Compatibility: The PCIE to M.2 adapter is plug-and-play, native support for 11/10/8/7/Linux/for macOS. unformatted SSD requires initialization and formatting via OS tools before system detection. NOTE: Need to connect drive to motherboard via included 7 pin to 7 pin data cable when using with 2.5 inch hard drive, otherwise it can't recognize SSD. Color:As Shown Material:PC+Metal Package Contents: 1 * 2.5-Inch U.2 to PCI-e 4.0 X4 X8 X16 Adapter Card Only 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.