Average Bench: 138% (159th of 1058)

Based on 16,406 user benchmarks.  Model: WDC PC SN520 SDAPNUW-256G-1002

Outstanding average bench

The WDC PC SN520 SDAPNUW-256G-1002 256GB averaged 37.6% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the WDC PC SN520 SDAPNUW-256G-1002 256GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 580MB/s
Avg. 4K-64Thread Read Speed 712MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the WDC PC SN520 SDAPNUW-256G-1002 256GB is 86.6%. This is a particularly wide range which indicates that the WDC PC SN520 SDAPNUW-256G-1002 256GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 323MB/s
Avg. 4K Random Write Speed 95.2MB/s

Average Bench

(Based on 16,406 samples)
Min Avg Max
558 Read 878 1,189
289 Write 799 1,179
327 Mixed 685 1,012
176 SusWrite 323 440
150% 671 MB/s
Min Avg Max
20.2 4K Read 45 44.7
39.1 4K Write 95.2 132
20.8 4K Mixed 49.5 63.3
182% 63.2 MB/s
Min Avg Max
332 DQ Read 712 858
158 DQ Write 522 843
203 DQ Mixed 580 734
444% 605 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
181GB free (System drive)
Firmware: 20110000
SusWrite @10s intervals: 516 423 426 426 428 429 MB/s
Read 1,195
Write 1,196
Mixed 1,017
SusWrite 441
216% 962 MB/s
4K Read 49.6
4K Write 179
4K Mixed 73.3
264% 101 MB/s
DQ Read 855
DQ Write 868
DQ Mixed 722
581% 815 MB/s
183GB free (System drive)
Firmware: 20110000
SusWrite @10s intervals: 541 406 418 420 379 390 MB/s
Read 1,029
Write 1,036
Mixed 852
SusWrite 426
188% 836 MB/s
4K Read 43.8
4K Write 123
4K Mixed 62.5
211% 76.3 MB/s
DQ Read 833
DQ Write 566
DQ Mixed 726
535% 708 MB/s
16,406 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 51,465,604 SSDs tested.

Typical PC SN520 SDAPNUW-256G-1002 256GB Builds (Compare 6,846 builds) See popular component choices, score breakdowns and rankings.
Gaming 8%
Tree trunk
Desktop 73%
Workstation 8%
Tree trunk

System: Asus ROG Strix G531GT_G531GT


Popular PC SN520 SDAPNUW-256G-1002 256GB 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.
  • - SkillBench (space shooter) tests user input accuracy.
  • - 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.
Solid State Drive Rankings (Price vs Performance) January 2022 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.


1058 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 i5-12600K $289Nvidia RTX 3060-Ti $400Crucial MX500 250GB $48
Intel Core i5-12400F $184Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i5-11600K $250Nvidia RTX 3080 $700Samsung 850 Evo 120GB $200
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3200 C16 2x8GB $67SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $39Corsair Vengeance LPX DDR4 3000 C15 2x8GB $75SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $71G.SKILL Trident Z DDR4 3200 C14 4x16GB $470SanDisk Ultra Fit 32GB $16
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