RIITOP M.2 NVMe to PCIe Adapter Allows adding NVMe SSD Hard Drive to your PC Desktop at perfect performance Compatible with M Key M.2 SSDs (PCI-e NVMe): 80x22mm, 60x22mm and 42x22mm. Hardware Requirement: Available PCI-e 4.0/3.0/2.0/1.0 x4/x8/x16 Slot on Mainboard Package Including: 1x PCIe M. 2 NVMe Adapter Card.; 1x Screwdriver; Silicone pads; Spare Screws. Please NOTE: 1. This M.2 PCIe adapter can Only Support M.2 PCI-e Based M Key Nvme SSD, DO NOT support PCI-e M Key AHCI SSD, SATA based B+M key or B Key SSD. 2. DO NOT support PCI-e x1 slot, please note! 3. Please download driver of SSD from the brand official website if 'Disk Management' or 'Device Management' can not show the SSD. 4. Old MB can not support Booting from 'NVMe', Please confirm the MB's specification