The Reletech P400 is a solid-state drive in the M.2 2280 form factor, launched in 2021. It is available in capacities ranging from 256 GB to 512 GB. This page reports specifications for the 512 GB variant. With the rest of the system, the Reletech P400 interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the PS5012-E12S-32 from Phison, a DRAM cache chip is available. Reletech has installed 64-layer TLC NAND flash on the P400, the flash chips are made by YMTC. 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 22 GB, once it is full, writes complete at 585 MB/s. The P400 is rated for sequential read speeds of up to 3,500 MB/s and 2,600 MB/s write.
At its launch, the SSD was priced at 56 USD. The warranty length is set to five years, which is an excellent warranty period. Reletech guarantees an endurance rating of 890 TBW, a good value.