TEST: Western Digital WD_BLACK SN770 1TB M.2 SSD

Technical data
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Manufacturer	Western Digital
Model number	WDS100T3X0E
Storage capacity	1024 GB (932 GiB)
pSLC-Cache	>300 GB approx.
Read speed	5150 MB/s
Write speed	4900 MB/s
Interface	PCIe 4.0 x4
Connection	M.2 2280
Memory module (NAND)	TLC
DRAM Cache	no
TBW (Total Bytes Written)	600 Terabyte
Controller	WD 20-82-10081-A1
Price	ca. 75 USD (= 0,07 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

73 %

Write speed

70 %

*) 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 4709 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	4505,25 MB/s	4256,47 MB/s
4K in megabytes per second	68,15 MB/s	195,00 MB/s
4K-64Thrd in megabytes per second	1054,25 MB/s	1706,99 MB/s
Access time in milliseconds	0,023 ms	0,113 ms
Score	1573	2328
Total score	4709

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 October 15, 2023 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	1830,72 MB/s	1,26 s
Program many small files	1241,07 MB/s	5,67 s
Game small and large files	1790,02 MB/s	3,86 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 5150MB/s and 4900MB/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	5220,93	4858,71
SEQ1M Q1T1	4203,85	4837,63
RND4K Q32T16	2303,96	2609,56
RND4K Q1T1	61,28	216,34

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 300 GB was written to the medium. The exact cache size could not be determined, because the test file did not exhaust the cache (brought it to the limit).At least the test file could be read with an average write speed of 4683 MB/s and written with 4448 MB/s.

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. is written. The transfer data is displayed. The more constant the line, the better.

The benchmark test was performed on October 15, 2023.
Information about the test system can be found at the bottom of the home page.
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