The Western Digital SN750 is a solid-state drive in the M.2 2280 form factor, launched on January 18th, 2019. It is available in capacities ranging from 250 GB to 4 TB. This page reports specifications for the 4 TB variant. With the rest of the system, the Western Digital SN750 interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the 20-82-007011 Triton MP28 from WD. Western Digital has installed 64-layer TLC NAND flash on the SN750, the flash chips are made by Toshiba. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are handled more quickly. The SN750 is rated for sequential read speeds of up to 3,400 MB/s and 3,100 MB/s write; random IO reaches 550K IOPS for read and 520K for writes.
The SSD's price at launch is unknown. The warranty length is set to five years, which is an excellent warranty period. Western Digital guarantees an endurance rating of 2400 TBW, a typical value for consumer SSDs.