TEST: Western Digital WD Green SN350 240GB M.2 SSD

Technical data
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Manufacturer	Western Digital
Model number	WDS240G2G0C
Storage capacity	240 GB (224 GiB)
pSLC-Cache	3 GB approx.
Read speed	2400 MB/s
Write speed	900 MB/s
Interface	PCIe 3.0 x4
Connection	M.2 2280
Memory module (NAND)	TLC
DRAM Cache	no
TBW (Total Bytes Written)	40 Terabyte
Controller	WD 20-82-01008-A2
Price	ca. 27 AUD (= 0,11 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

64 %

Write speed

20 %

*) 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 1405 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	2005,38 MB/s	274,65 MB/s
4K in megabytes per second	45,73 MB/s	100,39 MB/s
4K-64Thrd in megabytes per second	567,42 MB/s	120,43 MB/s
Access time in milliseconds	0,031 ms	0,442 ms
Score	814	248
Total score	1405

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 June 24, 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	1270,81 MB/s	1,81 s
Program many small files	170,41 MB/s	41,31 s
Game small and large files	133,90 MB/s	51,59 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 900MB/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	2334,14	558,32
SEQ1M Q1T1	1508,54	142,14
RND4K Q32T16	500,97	209,40
RND4K Q1T1	43,01	154,95