TEST: Western Digital WD_BLACK SN850 2TB M.2 SSD

Here you can find a detailed performance and benchmark test of the M.2 NVMe SSD WD_BLACK SN850 with 2TB (WDS200T1X0E-00AFY0) from Western Digital.
Score
7911
Price/GB
0,09 €


Technical data
Image WD_BLACK SN850
Manufacturer Western Digital
Model number WDS200T1X0E-00AFY0
Storage capacity 2048 GB (1863 GiB)
pSLC-Cache 224 GB approx.
Read speed 7000 MB/s
Write speed 5100 MB/s
Interface PCIe 4.0 x4
Connection M.2 2280
Memory module (NAND) TLC
DRAM Cache ✓ yes
TBW (Total Bytes Written) 1200 Terabyte
Controller WD 20-82-10034-A1
Price ca. 188 USD (= 0,09 $ / GB)
Paid link Buy on Amazon
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Compared to the top performer*
Read speed
95 %
Write speed
73 %

*) 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 7911 points was achieved.

AS SSD TEST: Western Digital WD_BLACK SN850 2TB

AS SSD Read: Write:
Seq
in megabytes per second
5801,10 MB/s
5096,68 MB/s
4K
in megabytes per second
66,44 MB/s
192,91 MB/s
4K-64Thrd
in megabytes per second
2399,71 MB/s
2641,19 MB/s
Access time
in milliseconds
0,018 ms
0,094 ms
Score
3046
3344
Total score
7911

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 May 05, 2021 shows the performance for simultaneous write and read operations. The lower the duration, the better the performance.

AS SSD TEST: Western Digital WD_BLACK SN850 2TB
AS SSD Copy-Benchmark Transfer rate: Duration:
ISO
two large files
2041,46 MB/s
1,13 s
Program
many small files
164,05 MB/s
42,91 s
Game
small and large files
1923,69 MB/s
3,59 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 7000MB/s and 5100MB/s respectively).

AS SSD TEST: Western Digital WD_BLACK SN850 2TB

CrystalDiskMark Benchmark

Here, two sequential and two random performance tests are performed, similar to the ones performed on the AS SSD.

CrystalDiskMark Benchmark TEST: Western Digital WD_BLACK SN850 2TB
CDM Read [MB/s] Write [MB/s]
SEQ1M
Q8T1
7070,26
5189,83
SEQ1M
Q1T1
4269,34
5163,23
RND4K
Q32T16
3553,43
2846,33
RND4K
Q1T1
72,28
238,73

Input/Output operations per second

CDM Read [IOPS] Write [IOPS]
SEQ1M
Q8T1
6.742,70
4.949,40
SEQ1M
Q1T1
4.071,60
4.924,00
RND4K
Q32T16
867.537,00
694.905,00
RND4K
Q1T1
17.645,80
58.284,20

Average latency

CDM Read [µs] Write [µs]
SEQ1M
Q8T1
1.185,62
1.613,85
SEQ1M
Q1T1
245,43
202,87
RND4K
Q32T16
572,28
733,21
RND4K
Q1T1
56,48
17,02

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 250 GB was written to the medium. After approx. 224 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 5303 MB/s and written with 3789 MB/s.

HD Tune Endurance Test TEST: Western Digital WD_BLACK SN850 2TB

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.

HD Tune TEST: Western Digital WD_BLACK SN850 2TB

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.

ATTO Disk Benchmark TEST: Western Digital WD_BLACK SN850 2TB

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.

SSD-Z TEST: Western Digital WD_BLACK SN850 2TB


Information about the test system can be found at the bottom of the home page.
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