Samsung SM951 256GB PCIe Gen3 8Gb/s x4 M.2 80mm (AHCI Version) Solid State Drive SSD M.2 Interface: PCIe 3.0 x4 lanes, up to 32Gb/s MTBF: 1.5 Million Hours / RoHS Compliant Compliant with PCI Express Base Specification Rev. 3.0 Works with most motherboards and notebooks with a compatible M.2 PCIe interface slot. Includes Z97 and X99 motherboards and pre-cylindrical Mac Pro. IMPORTANT NOTE: NOT Compatible with the MacBook, MacBook Air or MacBook Pro, iMac, Mac Mini, or the current 'cylindrical' model Mac Pro Support Standard AHCI driver