TEST: Western Digital WD_BLACK SN770 500GB M.2 SSD

Technical data
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Manufacturer	Western Digital
Model number	WDS500G3X0E
Storage capacity	500 GB (466 GiB)
pSLC-Cache	175 GB approx.
Read speed	5000 MB/s
Write speed	4000 MB/s
Interface	PCIe 4.0 x4
Connection	M.2 2280
Memory module (NAND)	TLC
DRAM Cache	no
TBW (Total Bytes Written)	300 Terabyte
Controller	WD 20-82-10081-A1
Price	ca. 70 USD (= 0,14 $ / GB)
Paid link	Buy on Amazon

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Compared to the top performer*

Read speed

68 %

Write speed

69 %

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

AS SSD Benchmark

Standard performance test

The standard test was performed using a 5 GB file. A total score of 4352 points was achieved.

AS SSD	Read:	Write:
Seq in megabytes per second	4377,32 MB/s	3523,06 MB/s
4K in megabytes per second	68,50 MB/s	196,09 MB/s
4K-64Thrd in megabytes per second	798,29 MB/s	1855,78 MB/s
Access time in milliseconds	0,023 ms	0,113 ms
Score	1305	2404
Total score	4352

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 19, 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	2070,03 MB/s	1,11 s
Program many small files	1218,09 MB/s	5,78 s
Game small and large files	1815,38 MB/s	3,81 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 5000MB/s and 4000MB/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	5071,98	3978,73
SEQ1M Q1T1	3978,04	3984,70
RND4K Q32T16	1320,82	2541,42
RND4K Q1T1	59,06	218,82

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. A test file of 200 GB was written to the medium. After approx. 175 GB, the pSLC-Cache was full and the performance was throttled.
At least the test file could be read with an average write speed of 4393 MB/s and written with 1669 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 November 19, 2022.
Information about the test system can be found at the bottom of the home page.
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