TEST: Lexar NM620 2TB M.2 SSD

Technical data
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Manufacturer	Lexar
Model number	LNM620X002T-RNNN
Storage capacity	2048 GB (1908 GiB)
pSLC-Cache	150 GB approx.
Read speed	3300 MB/s
Write speed	3000 MB/s
Interface	PCIe 3.0 x4
Connection	M.2 2280
Memory module (NAND)	TLC
DRAM Cache	no
TBW (Total Bytes Written)	1000 Terabyte
Controller	InnoGrit IG5216
Price	ca. 124 USD (= 0,06 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

96 %

Write speed

93 %

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

AS SSD Benchmark

Standard performance test

The standard test was performed with a 5 GB file. A total score of 4360 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	3125,65 MB/s	2821,12 MB/s
4K in megabytes per second	56,97 MB/s	151,97 MB/s
4K-64Thrd in megabytes per second	1457,29 MB/s	1172,88 MB/s
Access time in milliseconds	0,023 ms	0,539 ms
Score	1827	1607
Total score	4360

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 April 19, 2023 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	2194,36 MB/s	1,05 s
Program many small files	1113,41 MB/s	6,32 s
Game small and large files	1935,44 MB/s	3,57 s

Compression Performance Test

Here, the writing and reading 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 3000MB/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	3591,16	3111,07
SEQ1M Q1T1	2470,31	2855,79
RND4K Q32T16	2145,61	1434,31
RND4K Q1T1	65,10	172,72

HD Tune Pro Endurance test

A long-term test was performed here 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 200 GB was written to the medium. After approx. 150 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 2617 MB/s and written with 1965 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. is written. The transfer data is displayed. The more constant the line, the better.

The benchmark test was performed on April 19, 2023.
Information about the test system can be found at the bottom of the home page.
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