Seagate FireCuda 520 2TB NVMe M.2 2280-D2 SSD, FireCuda 520 Series, Interface: PCIe Gen4 ×4, NVMe 1.3, NAND Flash Memory 3D TLC, Form Factor M.2 2280-D2, SQL Read Up to 5,000 MB/s/Write Up to 4,400 MB/s, Random Read IOPS 750K/Write IOPS: 700K, Endurance 3600 TBW, MTBF 1,800,000 Hours, 05 Years Limited Warranty. Seagate FireCuda 520 SSD with PCIe Gen4 ×4 interface is our fastest solid state drive - nearly 45% faster sequential reads/writes than the previous generation.