The Western Digital SN570 is a solid-state drive in the M.2 2280 form factor, launched on December 13th, 2021. It is available in capacities ranging from 250 GB to 1 TB. This page reports specifications for the 1 TB variant. With the rest of the system, the Western Digital SN570 interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the 20-82-10048-A1 Polaris MP16 from WD, a DRAM cache is not available. Western Digital has installed 112-layer TLC NAND flash on the SN570, the flash chips are made by Toshiba. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are processed more quickly. The cache is sized at 13 GB, once it is full, writes complete at 615 MB/s. The SN570 is rated for sequential read speeds of up to 3,500 MB/s and 3,000 MB/s write; random IOPS reach up to 460K for reads and 450K for writes.
At its launch, the SSD was priced at 110 USD. The warranty length is set to five years, which is an excellent warranty period. Western Digital guarantees an endurance rating of 600 TBW, a typical value for consumer SSDs.