Western Digital's Blue SN570 1TB Solid State Drive  gives  your machine the power of an M.2 PCIe NVMe SSD while remaining affordable. The Blue SN570 is equipped with a  PCIe 3.0 x4 NVMe 1.4 interface , an  endurance of 600 TB,  NAND 3D TLC memory chips . The  WD Blue SN570 1TB (WDS100T3B0C) M.2 PCIe 3.0 4x NVMe  SSD offers to propel your PC to speeds of up to  3500 MB/s in reading and 3000 MB/s in writing and  the number of operations per second reaches  460 000 read IOPS and 450,000 write IOPS  (4 KB).  

Specifications:
Disc Format: M.2 card
Disk capacity: 1TB
Interface: PCI-E 3.0 4x
Reading speed: 3500 MB/s
Write speed: 3000 MB/s