The Western Digital SN730 is a solid-state drive in the M.2 2280 form factor, launched in 2019. It is available in capacities ranging from 256 GB to 1 TB. This page reports specifications for the 512 GB variant. With the rest of the system, the Western Digital SN730 interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the 20-82-00705-A2 Triton MP28 from WD, a DRAM cache chip is available. Western Digital has installed 96-layer TLC NAND flash on the SN730, 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 SN730 is rated for sequential read speeds of up to 3,400 MB/s and 2,700 MB/s write; random IOPS reach up to 460K for reads and 400K for writes.
At its launch, the SSD was priced at 152 USD. The warranty length is set to five years, which is an excellent warranty period. Western Digital guarantees an endurance rating of 300 TBW, a typical value for consumer SSDs.