HP EX950 1TB NVMe 3500MB/sec HP EX950 M.2 1TB PCIe 3.1 x4 NVMe 3D TLC NAND Internal Solid State Drive (SSD), Sequential read/write speeds up to 3, 500 Mbps/ 2, 900 Mbps, an industry top leading reliability (MTBF) 2M hours, and endurance (TBW) up to 1400 TBW [5MS23AA#ABC] (5Yr)