TEST: Western Digital WD_BLACK SN750 250GB M.2 SSD

Technical data
Image
Manufacturer	Western Digital
Model number	WDS250G3X0C-00SJG0
Storage capacity	250 GB (233 GiB)
pSLC-Cache	3 GB approx.
Read speed	3100 MB/s
Write speed	1600 MB/s
Interface	PCIe 3.0 x4
Connection	M.2 2280
Memory module (NAND)	TLC
DRAM Cache	✓ yes
TBW (Total Bytes Written)	200 Terabyte
Controller	WD 20-82-007011
Price	ca. 80 USD (= 0,32 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

88 %

Write speed

46 %

*) 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 2133 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	2738,51 MB/s	983,79 MB/s
4K in megabytes per second	45,86 MB/s	186,00 MB/s
4K-64Thrd in megabytes per second	621,07 MB/s	501,96 MB/s
Access time in milliseconds	0,023 ms	0,144 ms
Score	941	786
Total score	2133

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 17, 2021 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	1786,78 MB/s	1,29 s
Program many small files	677,45 MB/s	10,39 s
Game small and large files	515,04 MB/s	13,41 s

Compression Performance Test

This measures the write and read speed of the the Western Digital SSDSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 3100MB/s and 1600MB/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	3200,89	1259,24
SEQ1M Q1T1	1726,64	1107,76
RND4K Q32T16	769,22	860,22
RND4K Q1T1	47,88	207,75

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 10 GB was written to the medium. After approx. 3 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 2841 MB/s and written with 699 MB/s.

HD Tune Pro Benchmark

HD Tune writes a 5 GB file to the Western Digital 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 Western Digital 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 Western Digital M.2 SSD here. is written. The transfer data is displayed. The more constant the line, the better.

The benchmark test was performed on August 17, 2021.
Information about the test system can be found at the bottom of the home page.
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