The Samsung PM9B1 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 1 TB. This page reports specifications for the 1 TB variant. With the rest of the system, the Samsung PM9B1 interfaces using a PCI-Express 4.0 x4 connection. The SSD controller is the 88SS1322 Whistler Plus from Marvell, a DRAM cache is not available. Samsung has installed 128-layer TLC NAND flash on the PM9B1, the flash chips are made by Samsung. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are soaked up more quickly. Thanks to support for the fast PCI-Express 4.0 interface, performance is excellent. The PM9B1 is rated for sequential read speeds of up to 3,600 MB/s and 3,000 MB/s write; random IOPS reach up to 500K for reads and 420K for writes.
The SSD's price at launch is unknown. The TBW rating for the Samsung PM9B1 1 TB is unknown, too.