TEST: Western Digital WD Blue SN550 2TB M.2 SSD

Technical data
Image
Manufacturer	Western Digital
Model number	WDS200T2B0C
Storage capacity	2048 GB (1863 GiB)
Read speed	2600 MB/s
Write speed	1800 MB/s
Interface	PCIe 3.0 x4
Connection	M.2 2280
Memory module (NAND)	TLC
DRAM Cache	no
TBW (Total Bytes Written)	900 Terabyte
Controller	WD 20-82-01008-A1
Price	ca. 349 AUD (= 0,17 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

69 %

Write speed

55 %

*) 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 3657 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	2331,36 MB/s	1807,95 MB/s
4K in megabytes per second	46,55 MB/s	172,29 MB/s
4K-64Thrd in megabytes per second	893,90 MB/s	1546,70 MB/s
Access time in milliseconds	0,022 ms	0,224 ms
Score	1174	1900
Total score	3657

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 February 22, 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	1641,26 MB/s	1,40 s
Program many small files	709,01 MB/s	9,93 s
Game small and large files	1398,63 MB/s	4,94 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 2600MB/s and 1800MB/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	2597,87	1890,68
SEQ1M Q1T1	1938,77	1893,47
RND4K Q32T16	899,22	1596,16
RND4K Q1T1	44,05	181,21