M.2 NVMe to PCIe 4.0 X4 Adapter: It allows you to install an M.2 NVMe SSD into the M.2 Key M slot by converting one PCIe X4/X8/X16 slot on the motherboard. It is FCC and CE certified, ensuring highly reliable and stable PCIe X4 full speed. Your M.2 NVMe SSD speed remains unaffected, just as if it was installed on the motherboard. With no limit to the capacity of the M.2 NVMe SSD, you can enjoy up to 2T/4T storage, support 22110/2280/2260/2242/2230 PCIe (NVMe/AHCI) 4.0/3.0 M.2 SSD (Note: Not support M.2 SATA SSD) To reach PCIe 4.0 X4 (64Gbps) full speed, the CPU and motherboard PCIe slot and PCIe M.2 SSD should all be PCIe 4.0 features (Note: PCIe 4.0 is not supported on Intel CPUs below 11th generation) Experience seamless OS booting by reinstalling your OS and setting up BIOS/UEFI boot from this M.2 NVMe SSD. Plug-and-play in Windows 11/10/8/Linux/Mac OS (Note: Not support Windows 7). The new M.2 NVMe SSD needs to be initialized and formatted before it can be recognized by the PC