Lexar NM620 512Gb SSD specifications

Posted on November 07, 2022 by Raymond Chen

Lexar's NM620 NVMe SSD use PCIe M.2 3.0 x 4 bus. More details about this SSD here.

Lexar NM620 512Gb SSD specifications

Lexar's 512Gb NM620 is powered by Lexar DM620 controller. The NM620 comes equipped with 3D TLC flash memory. This NVMe also available in 1 Tb and 256 Gb capacities.

Performance and benchmarks

Lexar NM620 works on PCIe M.2 3.0 x 4 expansion standard with maximum write speeds 3000 MB/s, and maximum read speeds 3300 MB/s. It also has IOPS 300000 on reading and 256000 on writing operations.

Endurance and warranty

Manufacturer provide 5 years warranty for this product that limited by endurance 167 TBW. The NM620 has 1.5 million hours mean time between failure.


Category Value
Capacity 512 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) 167
MTBF (million hours) 1.5
Warranty (years) 5


NM620 (512Gb) produced by Lexar support previous bus standard that is significantly slower than PCIe 4.0. The sequential write speed is 3000 Mbps, that is pretty good for this computer expansion bus standard. The NVMe SSD has endurance 167 TBW, that is bad in comparison with nearest competitors. On balance, Lexar NM620 512Gb has more minuses and our site strongly do not advise to have it.

+ Pros

  • Good writing speed

- Cons

  • PCIe 3.0
  • Capacity
  • Writing speed

Buy this or similar SSD:

Video Review

Lexar NM620 M 2 2280 PCIe Gen3x4 NVMe SSD introduced by Squirrel Mark


The Lexar NM620 has no DRAM or information about it is not known. DRAM makes SSD work faster, but more expensive.

The Lexar NM620 512Gb due to the low density of memory chips able to operate without further heat sinks. Some motherboards from the factory has thermal pads above or below the SSD for better performance during times of high loads.

The Lexar NM620 has sequential write speed 3000 Mbps, read speed 3300 Mbps. SSD works on Lexar DM620 controller and M.2 3.0 x 4 high-speed serial computer expansion bus standard. The NAND memory type is 3D TLC.
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