The XPG Gammix S50 was a solid-state drive in the M.2 2280 form factor, launched on July 31st, 2019, that is no longer in production. It was available in capacities ranging from 1 TB to 2 TB. This page reports specifications for the 2 TB variant. With the rest of the system, the XPG Gammix S50 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. XPG has installed 96-layer TLC NAND flash on the Gammix S50, the flash chips are made by Toshiba. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are soaked up more quickly. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The Gammix S50 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 750K for writes.
At its launch, the SSD was priced at 400 USD. The warranty length is set to five years, which is an excellent warranty period. XPG guarantees an endurance rating of 3600 TBW, a good value.