The Samsung 870 EVO is a solid-state drive in the 2.5" form factor, launched on January 20th, 2021. It is available in capacities ranging from 500 GB to 4 TB. This page reports specifications for the 4 TB variant. With the rest of the system, the Samsung 870 EVO interfaces using a SATA 6 Gbps connection. The SSD controller is the MKX (Metis S4LR059) from Samsung, a DRAM cache chip is available. Samsung has installed 128-layer TLC NAND flash on the 870 EVO, the flash chips are made by Samsung. Please note that this SSD is sold in multiple variants with different NAND flash or controller, which could affect performance, the "Notes" section at the end of this page has more info. 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 78 GB, once it is full, writes complete at 530 MB/s. The 870 EVO is rated for sequential read speeds of up to 560 MB/s and 530 MB/s write; random IOPS reach up to 98K for reads and 88K for writes.
At its launch, the SSD was priced at 480 USD. The warranty length is set to five years, which is an excellent warranty period. Samsung guarantees an endurance rating of 2400 TBW, a typical value for consumer SSDs.