Average Bench: 152% (129th of 1040)

Based on 1,787 user benchmarks.  Model: WDC PC SN520 SDAPNUW-256G-1032

Outstanding average bench

The WDC PC SN520 SDAPNUW-256G-1032 256GB averaged 52.4% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the WDC PC SN520 SDAPNUW-256G-1032 256GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 652MB/s
Avg. 4K-64Thread Write Speed 749MB/s

Very poor consistency

The range of scores (95th - 5th percentile) for the WDC PC SN520 SDAPNUW-256G-1032 256GB is 74.7%. This is a particularly wide range which indicates that the WDC PC SN520 SDAPNUW-256G-1032 256GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 339MB/s
Avg. Sequential Mixed IO Speed 714MB/s

Average Bench

(Based on 1,787 samples)
Min Avg Max
615 Read 942 1,178
389 Write 836 1,133
372 Mixed 714 968
198 SusWrite 339 442
158% 708 MB/s
Min Avg Max
24.4 4K Read 45.5 45.9
49.9 4K Write 112 145
23.2 4K Mixed 54.3 66.2
198% 70.5 MB/s
Min Avg Max
426 DQ Read 770 860
226 DQ Write 749 1,042
269 DQ Mixed 652 735
519% 724 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
51GB free (System drive)
Firmware: 20140000
SusWrite @10s intervals: 208 150 155 155 205 150 MB/s
Read 815
Write 833
Mixed 715
SusWrite 170
142% 633 MB/s
4K Read 41.6
4K Write 118
4K Mixed 59.7
202% 73 MB/s
DQ Read 849
DQ Write 936
DQ Mixed 725
592% 837 MB/s
167GB free (System drive)
Firmware: 20140000
SusWrite @10s intervals: 373 328 304 295 291 317 MB/s
Read 713
Write 655
Mixed 634
SusWrite 318
130% 580 MB/s
4K Read 42.5
4K Write 110
4K Mixed 60.2
200% 70.7 MB/s
DQ Read 839
DQ Write 745
DQ Mixed 729
564% 771 MB/s
169GB free (System drive)
Firmware: 20140000
SusWrite @10s intervals: 431 355 318 327 329 317 MB/s
Read 776
Write 745
Mixed 674
SusWrite 346
143% 635 MB/s
4K Read 41.5
4K Write 107
4K Mixed 53.5
188% 67.2 MB/s
DQ Read 859
DQ Write 682
DQ Mixed 726
555% 756 MB/s
1,787 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 33,129,171 SSDs tested.

Typical PC SN520 SDAPNUW-256G-1032 256GB Builds (Compare 1,383 builds) See popular component choices, score breakdowns and rankings.
Gaming 9%
Tree trunk
Desktop 75%
Workstation 9%
Tree trunk

Motherboard: MSI MS-16R3


Popular PC SN520 SDAPNUW-256G-1032 256GB compatible motherboards:

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.

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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) October 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.


1040 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.
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Intel Core i5-9400F $142Nvidia RTX 3080 $700Samsung 850 Evo 120GB $78
Intel Core i5-10600K $260Nvidia GTX 1650S (Super) $170Samsung 860 Evo 250GB $50
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3200 C16 2x8GB $69SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $69SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $548SanDisk Extreme 16GB $28
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