The Samsung PM9A3 is a solid-state drive in the U.3 form factor, launched in February 2021. It is available in capacities ranging from 960 GB to 7.5 TB. This page reports specifications for the 1.9 TB variant. With the rest of the system, the Samsung PM9A3 interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the Elpis (S4LV003) from Samsung, a DRAM cache chip is available. Samsung has installed 128-layer TLC NAND flash on the PM9A3, the flash chips are made by Samsung. To improve write speeds, a cache is used, so bursts of incoming writes are handled more quickly. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The PM9A3 is rated for sequential read speeds of up to 6,800 MB/s and 2,700 MB/s write; random IO reaches 850K IOPS for read and 130K for writes.
The SSD's price at launch is unknown. The warranty length is set to five years, which is an excellent warranty period. Samsung guarantees an endurance rating of 3504 TBW, a high value.