The Addlink S90 was a solid-state drive in the M.2 2280 form factor, launched on November 6th, 2020, that is no longer in production. It was available in capacities ranging from 1 TB to 2 TB. This page reports specifications for the 1 TB variant. With the rest of the system, the Addlink S90 interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the PS5016-E16-32 from Phison, a DRAM cache chip is available. Addlink has installed 96-layer TLC NAND flash on the S90, 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. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The S90 is rated for sequential read speeds of up to 5,000 MB/s and 4,400 MB/s write; random IOPS reach up to 750K for reads and 700K for writes.
At its launch, the SSD was priced at 196 USD. The warranty length is set to five years, which is an excellent warranty period. Addlink guarantees an endurance rating of 1800 TBW, a good value.