The SK Hynix Gold P31 is a solid-state drive in the M.2 2280 form factor, launched on August 17th, 2021. It is available in capacities ranging from 500 GB to 2 TB. This page reports specifications for the 500 GB variant. With the rest of the system, the SK Hynix Gold P31 interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the Cepheus from SK Hynix, a DRAM cache chip is available. SK Hynix has installed 128-layer TLC NAND flash on the Gold P31, the flash chips are made by SK Hynix. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are soaked up more quickly. The cache is sized at 48 GB, once it is full, writes complete at 950 MB/s. The Gold P31 is rated for sequential read speeds of up to 3,500 MB/s and 3,100 MB/s write; random IOPS reach up to 570K for reads and 600K for writes.
At its launch, the SSD was priced at 74 USD. The warranty length is set to five years, which is an excellent warranty period. SK Hynix guarantees an endurance rating of 500 TBW, a good value.