The HP FX900 is a solid-state drive in the M.2 2280 form factor, launched in 2022. It is available in capacities ranging from 256 GB to 2 TB. This page reports specifications for the 1 TB variant. With the rest of the system, the HP FX900 interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the IG5220 (RainierQX) from InnoGrit, a DRAM cache is not available. HP has installed 176-layer TLC NAND flash on the FX900, the flash chips are made by Micron. 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 281 GB, once it is full, writes complete at 2000 MB/s. Copying data out of the SLC cache (folding) completes at 500 MB/s. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The FX900 is rated for sequential read speeds of up to 5,000 MB/s and 4,800 MB/s write; random IOPS reach up to 828K for reads and 0K for writes.
At its launch, the SSD was priced at 105 USD. The warranty length is set to five years, which is an excellent warranty period. HP guarantees an endurance rating of 400 TBW, a relatively low value compared to other SSDs.