Samsung PM951 128GB M.2 NGFF PCIe Gen3 x4, NVME Solid state drive SSD, OEM (2280) ( MZVLV128HCGR-00000) Model: PM951 / Interface: PCI Express Gen3 x4 Form Factor: M.2 / Capacity: 128GB Sequential Read: Up to 600 MB/s / Sequential Write: Up to 150 MB/s Random Read: Up to 140K IOPS / Random Write: Up to 37K IOPS Not compatible to iMac, Macbook Pro or Macbook Air