The Silicon Power XS70 is a solid-state drive in the M.2 2280 form factor, launched on January 16th, 2022. 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 Silicon Power XS70 interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the PS5018-E18-41 from Phison, a DRAM cache chip is available. Silicon Power has installed 176-layer TLC NAND flash on the XS70, 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 processed more quickly. The cache is sized at 100 GB, once it is full, writes complete at 2000 MB/s. Copying data out of the SLC cache (folding) completes at 1000 MB/s. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The XS70 is rated for sequential read speeds of up to 7,300 MB/s and 6,800 MB/s write.
At its launch, the SSD was priced at 130 USD. The warranty length is set to five years, which is an excellent warranty period. Silicon Power guarantees an endurance rating of 700 TBW, a typical value for consumer SSDs.