The Western Digital SN570 is a solid-state drive in the M.2 2280 form factor, launched on December 13th, 2021. It is only available in the 2 TB capacity listed on this page. With the rest of the system, the Western Digital SN570 interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the 20-82-10081-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. Please note that this SSD is sold in multiple variants with different NAND flash or controller, which could affect performance, the "Notes" section at the end of this page has more info. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are absorbed more quickly. The SN570 is rated for sequential read speeds of up to 3,500 MB/s and 3,500 MB/s write; random IO reaches 600K IOPS for read and 600K 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 900 TBW, a relatively low value compared to other SSDs.