M.2 NVMe SSD 256GB SK Hynix BC711, Interface: PCIe3.0 x4 / NVMe 1.3, M2 Type 2280 S3 form factor, Sequential Read 2100 MB/s, Sequential Write 1700 MB/s, Random Read 140K IOPS, Random Write 190K IOPS, 3D NAND TLC, Bulk