TEST: Western Digital WD Blue SN570 250GB M.2 SSD

Technical data
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Manufacturer	Western Digital
Model number	WDS250G2B0C
Storage capacity	250 GB (233 GiB)
pSLC-Cache	3 GB approx.
Read speed	2400 MB/s
Write speed	950 MB/s
Interface	PCIe 3.0 x4
Connection	M.2 2280
Memory module (NAND)	TLC
DRAM Cache	no
TBW (Total Bytes Written)	150 Terabyte
Controller	WD 20-82-10048-A1
Price	ca. 96 AUD (= 0,38 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

65 %

Write speed

24 %

*) 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 1336 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	1998,59 MB/s	430,94 MB/s
4K in megabytes per second	38,40 MB/s	168,44 MB/s
4K-64Thrd in megabytes per second	420,24 MB/s	196,20 MB/s
Access time in milliseconds	0,026 ms	0,291 ms
Score	659	408
Total score	1336

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 July 28, 2022 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	1386,91 MB/s	1,66 s
Program many small files	291,02 MB/s	24,19 s
Game small and large files	217,34 MB/s	31,78 s

Compression Performance Test

Here, the writing and reading speed of the the Western Digital SSDSSD is measured depending on the compressibility of the data (according to the manufacturer, these should be 2400MB/s and 950MB/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	2383,48	651,55
SEQ1M Q1T1	1579,16	763,42
RND4K Q32T16	534,76	346,42
RND4K Q1T1	43,58	181,03