The HP EX920 is a solid-state drive in the M.2 2280 form factor, launched on July 9th, 2018. It is available in capacities ranging from 256 GB to 1 TB. This page reports specifications for the 1 TB variant. With the rest of the system, the HP EX920 interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the SM2262ENG from Silicon Motion, a DRAM cache chip is available. HP has installed 64-layer TLC NAND flash on the EX920, the flash chips are made by Micron. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are absorbed more quickly. The cache is sized at 200 GB, once it is full, writes complete at 800 MB/s. The EX920 is rated for sequential read speeds of up to 3,200 MB/s and 1,800 MB/s write; random IO reaches 350K IOPS for read and 250K for writes.
At its launch, the SSD was priced at 285 USD. The warranty length is set to five years, which is an excellent warranty period. HP guarantees an endurance rating of 650 TBW, a typical value for consumer SSDs.