TEST: Lexar NM620 512GB M.2 SSD

Technical data
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Manufacturer	Lexar
Model number	LNM620X512G-RNNN
Storage capacity	512 GB (477 GiB)
pSLC-Cache	68 GB approx.
Read speed	3300 MB/s
Write speed	2400 MB/s
Interface	PCIe 3.0 x4
Connection	M.2 2280
Memory module (NAND)	TLC
DRAM Cache	no
TBW (Total Bytes Written)	250 Terabyte
Controller	Maxio MAP1202
Price	ca. 45 USD (= 0,09 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

95 %

Write speed

81 %

*) Test result evaluated according to AS SSD Score within the same size.

AS SSD Benchmark

Standard performance test

The standard test was performed using a 5 GB file. A total score of 2928 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	3208,02 MB/s	2409,91 MB/s
4K in megabytes per second	52,97 MB/s	159,08 MB/s
4K-64Thrd in megabytes per second	627,40 MB/s	1039,94 MB/s
Access time in milliseconds	0,023 ms	0,697 ms
Score	1001	1440
Total score	2928

Copy Performance Test

A common everyday situation is simulated here. Three test folders are created:

• ISO (folder with two large files)
• Program (folder with many small files)
• Game (folder with small and large files)

The three folders are copied using the Windows Copy command (the cache remains enabled). The practical test of July 18, 2024 shows the performance for simultaneous write and read operations. The lower the duration, the better the performance.

AS SSD Copy-Benchmark	Transfer rate:	Duration:
ISO two large files	2172,08 MB/s	1,06 s
Program many small files	1092,22 MB/s	6,44 s
Game small and large files	1936,65 MB/s	3,57 s

Compression Performance Test

This measures the write and read speed of the the Lexar SSDSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 3300MB/s and 2400MB/s respectively).

CrystalDiskMark Benchmark

Here, two sequential and two random performance tests are performed, similar to the ones performed on the AS SSD.

CDM	Read [MB/s]	Write [MB/s]
SEQ1M Q8T1	3648,85	2695,60
SEQ1M Q1T1	2582,80	2534,93
RND4K Q32T16	697,42	1340,26
RND4K Q1T1	60,19	174,96

HD Tune Pro Endurance test

This is a long term test to make full use of the memory capacity. You can see when a cache is full and the writing performance decreases. A test file of 100 GB was written to the medium. After approx. 68 GB, the pSLC-Cache was full and the performance was throttled.
At least the test file could be read with an average write speed of 2353 MB/s and written with 1218 MB/s.

HD Tune Pro Benchmark

HD Tune writes a 5 GB file to the Lexar M.2 SSD. The transfer data of the read speed is displayed graphically. The minimum, maximum and average values are also determined. The determined access time and burst rate are also displayed.

ATTO Disk Benchmark

Here, a 256 MB file is written several times to the Lexar M.2 SSD. The I/O block size varies (from 512 bytes to 64 megabytes). The larger the blocks, the faster they can be written and read.

SSD-Z Benchmark

Similar to HD Tune, a 500 MB file is written to the Lexar M.2 SSD here. The transfer data is displayed. The more constant the line, the better.

The benchmark test was performed on July 18, 2024.
Information about the test system can be found at the bottom of the home page.
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