TEST: Western Digital WD Blue SN5100 1TB M.2 SSD

Technical data
Image
Manufacturer	Western Digital
Model number	WDBS4F0010BNC-WRSN
Storage capacity	1024 GB (932 GiB)
pSLC-Cache	240 GB approx.
Read speed	7100 MB/s
Write speed	6700 MB/s
Interface	PCIe 4.0 x4
Connection	M.2 2280
Memory module (NAND)	QLC
DRAM Cache	no
TBW (Total Bytes Written)	600 Terabyte
Controller	SanDisk ​A101-000103-A1
Price	ca. 221 AUD (= 0,22 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

97 %

Write speed

80 %

*) Test result evaluated according to AS SSD Score within the same size.

This SSD is PS5 compatible. It can be used in a PlayStation 5 console as expansion storage.

AS SSD Benchmark

Standard performance test

The standard test was performed with a 5 GB file. A total score of 6034 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	6153,42 MB/s	5925,65 MB/s
4K in megabytes per second	65,67 MB/s	195,11 MB/s
4K-64Thrd in megabytes per second	1053,39 MB/s	2623,55 MB/s
Access time in milliseconds	0,018 ms	0,107 ms
Score	1734	3411
Total score	6034

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 January 05, 2026 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	2240,44 MB/s	1,03 s
Program many small files	1165,30 MB/s	6,04 s
Game small and large files	2010,65 MB/s	3,44 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 7100MB/s and 6700MB/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	7215,63	5479,59
SEQ1M Q1T1	5441,00	4801,72
RND4K Q32T16	4305,22	3116,69
RND4K Q1T1	102,03	219,95

HD Tune Pro Endurance test

A long-term test was performed here 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 400 GB was written to the medium. After approx. 240 GB, the pSLC-Cache was full and the performance was throttled.
The average read speed was 5867 MB/s and the average write speed was 605 MB/s.

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. Unfortunately the tool does not work correctly from about 5,000 MB/s and no line (and partly wrong min and max data) is displayed.

The benchmark test was performed on January 05, 2026.
Information about the test system can be found at the bottom of the home page.
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