Technical data | |
Image | |
Manufacturer | Lexar |
Model number | LNM790X001T-RNNNG |
Storage capacity | 1024 GB (954 GiB) |
pSLC-Cache | 120 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) | 1000 Terabyte |
Controller | Maxio MAP1602 |
Price | ca. 75 USD (= 0,07 $ / GB) |
Paid link | Buy on Amazon |
The standard test was performed using a 5 GB file. A total score of 7029 points was achieved.
AS SSD | Read: | Write: |
---|---|---|
Seq in megabytes per second |
6165,66 MB/s |
5658,94 MB/s |
4K in megabytes per second |
68,78 MB/s |
173,44 MB/s |
4K-64Thrd in megabytes per second |
2492,49 MB/s |
1513,54 MB/s |
Access time in milliseconds |
0,022 ms |
0,269 ms |
Score | 3178 |
2253 |
Total score | 7029 |
A common everyday situation is simulated here. Three test folders are created:
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 |
2241,82 MB/s |
1,03 s |
Program many small files |
1149,77 MB/s |
6,12 s |
Game small and large files |
1979,12 MB/s |
3,49 s |
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 7400MB/s and 6500MB/s respectively).
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 |
7453,28 |
6613,45 |
SEQ1M Q1T1 |
5114,82 |
5575,22 |
RND4K Q32T16 |
3429,78 |
2088,35 |
RND4K Q1T1 |
76,54 |
180,10 |
CDM | Read [IOPS] | Write [IOPS] |
---|---|---|
SEQ1M Q8T1 |
7.108,00 |
6.307,10 |
SEQ1M Q1T1 |
4.877,90 |
5.316,90 |
RND4K Q32T16 |
837.348,00 |
509.850,00 |
RND4K Q1T1 |
18.686,80 |
43.968,50 |
CDM | Read [µs] | Write [µs] |
---|---|---|
SEQ1M Q8T1 |
1.124,68 |
1.265,99 |
SEQ1M Q1T1 |
204,85 |
187,89 |
RND4K Q32T16 |
591,86 |
1.003,12 |
RND4K Q1T1 |
53,39 |
22,60 |
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 200 GB was written to the medium.
After approx. 120 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 4732 MB/s and written with 2679 MB/s.
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.
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.
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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