SNANSHI M.2 PCIe SSD Adapter Card to PCI-E x4 for M.2 NGFF SSD XP941 SM951 M6E PM951 950 PRO SSD Adapter card support socket 3 (Gen3 PCIe X4 AHCI or Gen3 PCIe X4 NVME or Gen3 PCIe 2X2) M key M.2 NGFF SSD and socket 2 (Gen2 PCIe X2) B+M key M.2 NGFF SSD SSD to PCIe X4 slot .The speed and other properties is not changed,only form conversion interface Support size: 22*42 mm,22*60 mm,22*80 mm M.2 NGFF SSD It's compatible with Windows 7,8,8.1,10,MAC OS 10.9,MAC OS 10.10 or higher version operating system and does not require any software drivers,because adapter card does not need through the integrated circuit to complete this function Note: this adapter is only for 'M' key M.2 PCIe SSD such as Samsung XP941/SM951/950 Pro, Plextor M6e Series, Kingston HyperX Predator M.2 SSDs. Not compatible with a 'B' key M.2 PCIe x2 SSD or 'B' key M.2 SATA SSD.