Average Bench: 114% (174th of 1037)

Based on 774 user benchmarks.  Model: PC SN520 NVMe WDC 128GB

Outstanding average bench

The PC SN520 NVMe WDC 128GB averaged 14.3% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the PC SN520 NVMe WDC 128GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 293MB/s
Avg. 4K Random Mixed IO Speed 49MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the PC SN520 NVMe WDC 128GB is 63.9%. This is a particularly wide range which indicates that the PC SN520 NVMe WDC 128GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 197MB/s
Avg. Sequential Mixed IO Speed 552MB/s

Average Bench

(Based on 774 samples)
Min Avg Max
501 Read 764 966
129 Write 600 751
234 Mixed 552 818
99.3 SusWrite 197 231
118% 528 MB/s
Min Avg Max
22.3 4K Read 40.5 46.7
50.1 4K Write 99.8 154
27.1 4K Mixed 49 66.2
177% 63.1 MB/s
Min Avg Max
272 DQ Read 401 440
129 DQ Write 379 610
194 DQ Mixed 293 406
247% 358 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
37GB free (System drive)
Firmware: 20240012 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 214 174 177 176 177 177 MB/s
Read 781
Write 574
Mixed 563
SusWrite 182
117% 525 MB/s
4K Read 39.5
4K Write 106
4K Mixed 54.7
186% 66.6 MB/s
DQ Read 424
DQ Write 395
DQ Mixed 287
249% 369 MB/s
81GB free (System drive)
Firmware: 20220012 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 283 217 217 217 217 217 MB/s
Read 831
Write 687
Mixed 634
SusWrite 228
133% 595 MB/s
4K Read 34
4K Write 94.8
4K Mixed 48.4
164% 59.1 MB/s
DQ Read 423
DQ Write 373
DQ Mixed 289
246% 362 MB/s
69GB free (System drive)
Firmware: 20220012 Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 217 217 211 204 200 203 MB/s
Read 705
Write 657
Mixed 582
SusWrite 209
120% 538 MB/s
4K Read 33.6
4K Write 78
4K Mixed 43.1
147% 51.6 MB/s
DQ Read 431
DQ Write 223
DQ Mixed 217
190% 290 MB/s
774 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 31,577,163 SSDs tested.

Typical SN520 NVMe WDC 128GB Builds (Compare 3,452 builds) See popular component choices, score breakdowns and rankings.
Gaming 11%
Tree trunk
Desktop 76%
Workstation 11%
Tree trunk

System: Dell G3 3590


Popular SN520 NVMe WDC 128GB systems:

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) September 2020 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.


1037 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different SSDs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i5-9600K $195Nvidia GTX 1660S (Super) $230Crucial MX500 250GB $45
Intel Core i5-9400F $140Nvidia GTX 1650S (Super) $170Samsung 850 Evo 120GB $78
Intel Core i7-9700K $300Nvidia RTX 2070S (Super) $510Samsung 860 Evo 250GB $42
Seagate Barracuda 1TB (2016) $35Corsair Vengeance LPX DDR4 3200 C16 2x8GB $66SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair Vengeance LPX DDR4 3000 C15 2x8GB $65SanDisk Extreme 32GB $30
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Extreme 16GB $28
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