TEST: Western Digital WD_BLACK SN850 1TB M.2 SSD
Here you can find a detailed performance and benchmark test of the M.2 NVMe SSD WD_BLACK SN850 with 1TB (WDS100T1X0E-00AFY0) from Western Digital.8590
0,10 €
| Technical data | |
| Image | 
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| Manufacturer | Western Digital |
| Model number | WDS100T1X0E-00AFY0 |
| Storage capacity | 1024 GB (931 GiB) |
| pSLC-Cache | 285 GB approx. |
| Read speed | 7000 MB/s |
| Write speed | 5300 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. 99 USD (= 0,10 $ / GB) |
| Buy on Amazon | |
Compared to the top performer*
*) 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 8590 points was achieved.
| AS SSD | Read: | Write: |
|---|---|---|
| Seq in megabytes per second |
5872,31 MB/s |
5194,93 MB/s |
| 4K in megabytes per second |
75,68 MB/s |
211,02 MB/s |
| 4K-64Thrd in megabytes per second |
2598,19 MB/s |
2963,93 MB/s |
| Access time in milliseconds |
0,018 ms |
0,089 ms |
| Score | 3261 |
3694 |
| Total score | 8590 |
|
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 September 29, 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 |
2102,81 MB/s |
1,09 s |
| Program many small files |
785,64 MB/s |
8,96 s |
| Game small and large files |
1574,80 MB/s |
4,39 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 5300MB/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 |
7033,99 |
5222,73 |
| SEQ1M Q1T1 |
4356,48 |
5230,67 |
| RND4K Q32T16 |
4092,40 |
2907,25 |
| RND4K Q1T1 |
81,14 |
220,13 |
Input/Output operations per second
| CDM | Read [IPOS] | Write [IPOS] |
|---|---|---|
| SEQ1M Q8T1 |
6.708,10 |
4.980,80 |
| SEQ1M Q1T1 |
4.154,70 |
4.988,40 |
| RND4K Q32T16 |
999.121,00 |
709.778,00 |
| RND4K Q1T1 |
19.810,30 |
53.742,20 |
Average latency
| CDM | Read [µs] | Write [µs] |
|---|---|---|
| SEQ1M Q8T1 |
1.191,93 |
1.603,66 |
| SEQ1M Q1T1 |
240,50 |
200,29 |
| RND4K Q32T16 |
501,78 |
720,13 |
| RND4K Q1T1 |
50,36 |
18,48 |
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.
Information about the test system can be found at the bottom of the home page.
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