M.2 NVMe SSD 500GB Silicon Power UD85, Interface:PCIe4.0 x4 / NVMe1.4, M2 Type 2280 form factor, Sequential Reads 3600 MB/s / Writes 2400 MB/s, MTBF 1.5mln, HMB, ECC, SLC Cache, E2E Data Protection, LDPC, Phison E21T, 3D NAND TLC