The Western Digital SN7100 is a solid-state drive in the M.2 2280 form factor, launched on November 21st, 2024. It is available in capacities ranging from 500 GB to 2 TB. This page reports specifications for the 500 GB variant. With the rest of the system, the Western Digital SN7100 interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the Polaris 3 A101-000103-A1 from WD, a DRAM cache is not available. Western Digital has installed 162-layer TLC NAND flash on the SN7100, the flash chips are made by Kioxia. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are handled more quickly. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The SN7100 is rated for sequential read speeds of up to 6,800 MB/s and 5,800 MB/s write; random IO reaches 760K IOPS for read and 1200K 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 300 TBW, a typical value for consumer SSDs.