The Western Digital SN8100 is a solid-state drive in the M.2 2280 form factor, launched in May 2025. It is available in capacities ranging from 1 TB to 4 TB. This page reports specifications for the 1 TB variant. With the rest of the system, the Western Digital SN8100 interfaces using a PCI-Express 5.0 x4 connection. The SSD controller is the SM2508 from Silicon Motion, a DRAM cache chip is available. Western Digital has installed 218-layer TLC NAND flash on the SN8100, the flash chips are made by Kioxia. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are absorbed more quickly. Thanks to support for the fast PCI-Express 5.0 interface, performance is excellent. The SN8100 is rated for sequential read speeds of up to 14,900 MB/s and 11,000 MB/s write; random IO reaches 1600K IOPS for read and 2400K 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 600 TBW, a typical value for consumer SSDs.