TEST: Western Digital WD_BLACK SN850X 1TB M.2 SSD

Technical data
Image
Manufacturer	Western Digital
Model number	WDS100T2X0E-00BCA0
Storage capacity	1024 GB (932 GiB)
Read speed	7300 MB/s
Write speed	6300 MB/s
Interface	PCIe 4.0 x4
Connection	M.2 2280
Memory module (NAND)	TLC
DRAM Cache	✓ yes
TBW (Total Bytes Written)	600 Terabyte
Controller	WD 20-82-10034-A1
Price	ca. 80 USD (= 0,08 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

98 %

Write speed

93 %

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

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

AS SSD Benchmark

Standard performance test

The standard test was performed using a 5 GB file. A total score of 8113 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	6040,51 MB/s	5837,72 MB/s
4K in megabytes per second	75,50 MB/s	195,89 MB/s
4K-64Thrd in megabytes per second	2246,96 MB/s	2915,97 MB/s
Access time in milliseconds	0,019 ms	0,093 ms
Score	2927	3696
Total score	8113

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 November 18, 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	2112,14 MB/s	1,09 s
Program many small files	1242,87 MB/s	5,66 s
Game small and large files	1851,27 MB/s	3,73 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 7300MB/s and 6300MB/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	7298,21	6371,56
SEQ1M Q1T1	5020,63	5734,50
RND4K Q32T16	3346,71	3107,89
RND4K Q1T1	80,30	214,99

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.

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. The transfer data is displayed. The more constant the line, the better. Unfortunately the tool does not work correctly above about 5,000 MB/s and no line (and sometimes wrong min and max data) is displayed.

The benchmark test was performed on November 18, 2022.
Information about the test system can be found at the bottom of the home page.
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