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 960 GB 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 processed 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 6,500 MB/s and 1,500 MB/s write; random IOPS reach up to 580K for reads and 70K 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 1752 TBW, a high value.