The XPG Gammix S70 is a solid-state drive in the M.2 2280 form factor, launched in September 2020. It is 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 XPG Gammix S70 interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the IG5236 (Rainier) from InnoGrit, a DRAM cache chip is available. XPG has installed 96-layer TLC NAND flash on the Gammix S70, the flash chips are made by Micron. Please note that this SSD is sold in multiple variants with different NAND flash or controller, which could affect performance, the "Notes" section at the end of this page has more info. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are handled more quickly. The cache is sized at 320 GB, once it is full, writes complete at 1240 MB/s. Copying data out of the SLC cache (folding) completes at 650 MB/s. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The Gammix S70 is rated for sequential read speeds of up to 7,400 MB/s and 5,500 MB/s write; random IO reaches 350K IOPS for read and 720K for writes.
At its launch, the SSD was priced at 200 USD. The warranty length is set to five years, which is an excellent warranty period. XPG guarantees an endurance rating of 740 TBW, a typical value for consumer SSDs.