The XPG Gammix S11 Pro is a solid-state drive in the M.2 2280 form factor, launched in 2019. It is available in capacities ranging from 256 GB to 2 TB. This page reports specifications for the 512 GB variant. With the rest of the system, the XPG Gammix S11 Pro interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the SM2262ENG from Silicon Motion, a DRAM cache chip is available. XPG has installed 64-layer TLC NAND flash on the Gammix S11 Pro, 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 Gammix S11 Pro is rated for sequential read speeds of up to 3,500 MB/s and 2,300 MB/s write; random IO reaches 390K IOPS for read and 380K for writes.
At its launch, the SSD was priced at 75 USD. The warranty length is set to five years, which is an excellent warranty period. XPG guarantees an endurance rating of 320 TBW, a typical value for consumer SSDs.