TEST: Lexar NM790 2TB M.2 SSD

Technical data
Image
Manufacturer	Lexar
Model number	LNM790X002T-RNNNG
Storage capacity	2048 GB (1908 GiB)
pSLC-Cache	195 GB approx.
Read speed	7400 MB/s
Write speed	6500 MB/s
Interface	PCIe 4.0 x4
Connection	M.2 2280
Memory module (NAND)	TLC
DRAM Cache	no
TBW (Total Bytes Written)	1500 Terabyte
Controller	Maxio MAP1602
Price	ca. 133 AUD (= 0,06 $ / GB)
Paid link	Buy on Amazon

Compare Product

Compared to the top performer*

Read speed

99 %

Write speed

95 %

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

This SSD is PS5 compatible. It can be used in a PlayStation 5 console as expansion storage.

AS SSD Benchmark

Standard performance test

The standard test was performed with a 5 GB file. A total score of 6943 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	6171,60 MB/s	5790,00 MB/s
4K in megabytes per second	69,03 MB/s	173,51 MB/s
4K-64Thrd in megabytes per second	2468,28 MB/s	1443,81 MB/s
Access time in milliseconds	0,022 ms	0,265 ms
Score	3154	2196
Total score	6943

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 August 28, 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	2098,44 MB/s	1,10 s
Program many small files	1136,63 MB/s	6,19 s
Game small and large files	1947,78 MB/s	3,55 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 7400MB/s and 6500MB/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	7436,02	6695,31
SEQ1M Q1T1	5115,66	5549,82
RND4K Q32T16	3475,82	2198,97
RND4K Q1T1	77,56	178,29