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

Here you can find a detailed performance and benchmark test of the M.2 NVMe SSD WD_BLACK SN850X with 2TB (WDS200T2X0E-00BCA0) from Western Digital.
Score
8735
Price/GB
0,08 €


Technical data
Image WD_BLACK SN850X
Manufacturer Western Digital
Model number WDS200T2X0E-00BCA0
Storage capacity 2048 GB (1863 GiB)
pSLC-Cache >300 GB approx.
Read speed 7300 MB/s
Write speed 6600 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. 160 USD (= 0,08 $ / GB)
Paid link Buy on Amazon
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Compared to the top performer*
Read speed
98 %
Write speed
94 %

*) 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 8735 points was achieved.

AS SSD TEST: Western Digital WD_BLACK SN850X 2TB

AS SSD Read: Write:
Seq
in megabytes per second
6148,59 MB/s
5920,82 MB/s
4K
in megabytes per second
74,39 MB/s
193,89 MB/s
4K-64Thrd
in megabytes per second
2549,27 MB/s
3065,06 MB/s
Access time
in milliseconds
0,020 ms
0,097 ms
Score
3239
3851
Total score
8735

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 27, 2023 shows the performance for simultaneous write and read operations. The lower the duration, the better the performance.

AS SSD TEST: Western Digital WD_BLACK SN850X 2TB
AS SSD Copy-Benchmark Transfer rate: Duration:
ISO
two large files
2045,76 MB/s
1,12 s
Program
many small files
1250,59 MB/s
5,63 s
Game
small and large files
1793,53 MB/s
3,85 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 7300MB/s and 6600MB/s respectively).

AS SSD TEST: Western Digital WD_BLACK SN850X 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 SN850X 2TB
CDM Read [MB/s] Write [MB/s]
SEQ1M
Q8T1
7360,09
6684,56
SEQ1M
Q1T1
5101,91
5788,18
RND4K
Q32T16
4090,63
3120,92
RND4K
Q1T1
79,80
213,75

Input/Output operations per second

CDM Read [IOPS] Write [IOPS]
SEQ1M
Q8T1
7.019,10
6.374,90
SEQ1M
Q1T1
4.865,60
5.520,00
RND4K
Q32T16
998.688,00
761.944,00
RND4K
Q1T1
19.482,40
52.184,60

Average latency

CDM Read [µs] Write [µs]
SEQ1M
Q8T1
1.138,35
1.252,54
SEQ1M
Q1T1
205,37
180,97
RND4K
Q32T16
497,37
670,92
RND4K
Q1T1
51,19
19,00

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 6329 MB/s and written with 5943 MB/s.

HD Tune Endurance Test TEST: Western Digital WD_BLACK SN850X 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 SN850X 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 SN850X 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 SN850X 2TB


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