M.2 NVMe SSD 256GB GOODRAM PX500 Gen3, Interface: PCIe3.0 x4 / NVMe1.4, M2 Type 2280 form factor, Sequential Reads/Writes 3200 MB/s/ 1300 MB/s, Random (4k QD64) Read/Write 80K IOPS/ 250K IOPS, SMI 2263XT, TBW: 150TB, 3D NAND TLC, heat-dissipating thermal pad