TEST: Lexar NQ790 2TB M.2 SSD
Here you can find a detailed performance and benchmark test of the M.2 NVMe SSD NQ790 with 2TB (LNQ790X002T-RNNNG) from Lexar.6552
0,06 $
| Technical data | |
| Image | 
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| Manufacturer | Lexar |
| Model number | LNQ790X002T-RNNNG |
| Storage capacity | 2048 GB (1863 GiB) |
| pSLC-Cache | >400 GB approx. |
| Read speed | 7000 MB/s |
| Write speed | 6000 MB/s |
| Interface | PCIe 4.0 x4 |
| Connection | M.2 2280 |
| Memory module (NAND) | QLC |
| DRAM Cache | no |
| TBW (Total Bytes Written) | 1200 Terabyte |
| Controller | Maxio MAP1602 |
| Price | ca. 131 USD (= 0,06 $ / GB) |
| Paid link | Buy on Amazon |
Compared to the top performer*
*) 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 6552 points was achieved.
| AS SSD | Read: | Write: |
|---|---|---|
| Seq in megabytes per second |
6048,26 MB/s |
5024,96 MB/s |
| 4K in megabytes per second |
61,63 MB/s |
193,69 MB/s |
| 4K-64Thrd in megabytes per second |
1358,16 MB/s |
2838,74 MB/s |
| Access time in milliseconds |
0,048 ms |
0,123 ms |
| Score | 2025 |
3535 |
| Total score | 6552 |
|
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 September 30, 2025 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 |
2596,70 MB/s |
0,88 s |
| Program many small files |
1168,94 MB/s |
6,02 s |
| Game small and large files |
2021,29 MB/s |
3,42 s |
Compression Performance Test
This measures the write and read speed of the Lexar SSD, depending on the compressibility of the data (according to the manufacturer, these should be 7000 MB/s and 6000 MB/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 |
7461,92 |
5558,05 |
| SEQ1M Q1T1 |
4374,27 |
5328,27 |
| RND4K Q32T16 |
1636,97 |
3157,25 |
| RND4K Q1T1 |
67,18 |
225,05 |
Input/Output operations per second
| CDM | Read [IOPS] | Write [IOPS] |
|---|---|---|
| SEQ1M Q8T1 |
7.116,20 |
5.300,60 |
| SEQ1M Q1T1 |
4.171,60 |
5.081,40 |
| RND4K Q32T16 |
399.652,00 |
770.814,00 |
| RND4K Q1T1 |
16.401,60 |
54.943,60 |
Average latency
| CDM | Read [µs] | Write [µs] |
|---|---|---|
| SEQ1M Q8T1 |
1.123,45 |
1.505,88 |
| SEQ1M Q1T1 |
239,54 |
196,61 |
| RND4K Q32T16 |
1.279,20 |
662,54 |
| RND4K Q1T1 |
60,86 |
18,05 |
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 400 GB was written to the medium. The exact cache size could not be determined, because the test file did not exhaust the cache (brought it to the limit). The average read speed was 5569 MB/s and the average write speed was 4860 MB/s.
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 were 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. Unfortunately, the tool does not work correctly above about 5,000 MB/s and no line (and sometimes wrong min and max data) is displayed.
Information about the test system can be found at the bottom of the home page.
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