Lexar NM620 256Gb NVMe SSD tech specifications

Posted on November 07, 2022 by Raymond Chen

Lexar's NM620 internal SSD use PCIe M.2 3.0 x 4 interface. More details about this NVMe SSD on this site.

Lexar NM620 256Gb NVMe SSD tech specifications

Lexar NM620 256Gb works on Lexar DM620 controller. The NM620 comes equipped with 3D TLC memory. This NVMe is offered also in 1 Tb and 512 Gb capacities.

Performance and benchmarks

Lexar NM620 use PCIe M.2 3.0 x 4 interface with read speeds 3300 MB/s, and maximum write speeds equals to 3000 Mbps. This model has input/output performance 300000 on reading and 256000 on writing operations.

Endurance and warranty

Manufacturer provide 5 years warranty for this product limited by endurance 250 TBW. The NM620 has 1.5 million hours MTBF.


Category Value
Capacity 256 Gb
Interface M.2 3.0 x 4
Controller Lexar DM620
Memory type 3D TLC
DRAM n/a
Read speed (Mb/s) 3300
Write speed (Mb/s) 3000
Read IOPS 300000
Write IOPS 256000
Endurance (TBW) 250
MTBF (million hours) 1.5
Warranty (years) 5


NM620 (256Gb) produced by Lexar may work on PCIe Gen3 that is twice slower than PCIe 4. The write speed is 3000 Mb/s, that is pretty good for this expansion standard. The Internal SSD provide possibility to write 250 TBW, that is pretty well in comparison with closest competitors. After evaluating all the facts, Lexar NM620 256Gb is a well-balanced drive.

+ Pros

  • Good writing speed
  • Endurance

- Cons

  • PCIe 3.0
  • Capacity

Buy this or similar SSD:

Video Review

Great Drive, Bad Competition - Lexar NM610 NVMe SSD Review


The Lexar NM620 256Gb is DRAMless SSD or information about it is not known. DRAM in their controller help to increase I/O performance and endurance.

The Lexar NM620 256Gb due to the low density of memory chips may last without further cooling systems. Some laptops or motherboards already has additional cooling below and above the drive for improving productivity during times of heavy loads.

The Lexar NM620 has sequential write speed 3000 Mb per second, read speed 3300 Mb/s. It works on Lexar DM620 controller and M.2 3.0 x 4 interface standard. The NAND flash memory type is 3D TLC.
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