Average Bench: 165% (125th of 1058)

Based on 429 user benchmarks.  Model: WDC PC SN520 SDAPNUW-512G-1114

Outstanding average bench

The WDC PC SN520 SDAPNUW-512G-1114 512GB averaged 64.6% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the WDC PC SN520 SDAPNUW-512G-1114 512GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 631MB/s
Avg. 4K-64Thread Read Speed 750MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the WDC PC SN520 SDAPNUW-512G-1114 512GB is 91.9%. This is a particularly wide range which indicates that the WDC PC SN520 SDAPNUW-512G-1114 512GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 602MB/s
Avg. 4K Random Write Speed 95MB/s

Average Bench

(Based on 429 samples)
Min Avg Max
773 Read 1,128 1,232
409 Write 1,000 1,236
482 Mixed 896 1,076
278 SusWrite 602 771
203% 906 MB/s
Min Avg Max
21.3 4K Read 40.9 44.2
45.1 4K Write 95 126
28.1 4K Mixed 50.3 63.4
177% 62.1 MB/s
Min Avg Max
447 DQ Read 750 977
195 DQ Write 537 824
207 DQ Mixed 631 883
475% 640 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
441GB free (System drive)
Firmware: 20180000
SusWrite @10s intervals: 874 763 743 743 743 747 MB/s
Read 1,224
Write 1,230
Mixed 1,073
SusWrite 769
242% 1,074 MB/s
4K Read 42
4K Write 107
4K Mixed 58.8
196% 69.3 MB/s
DQ Read 870
DQ Write 632
DQ Mixed 758
564% 753 MB/s
417GB free (System drive)
Firmware: 20180000
SusWrite @10s intervals: 861 755 737 738 739 735 MB/s
Read 1,223
Write 1,124
Mixed 1,127
SusWrite 761
238% 1,059 MB/s
4K Read 35.7
4K Write 76.2
4K Mixed 46.7
154% 52.9 MB/s
DQ Read 672
DQ Write 282
DQ Mixed 512
370% 489 MB/s
120GB free (System drive)
Firmware: 20180000
SusWrite @10s intervals: 380 107 93 85 93 140 MB/s
Read 893
Write 940
Mixed 511
SusWrite 150
139% 623 MB/s
4K Read 18.2
4K Write 50.8
4K Mixed 42.3
109% 37.1 MB/s
DQ Read 498
DQ Write 373
DQ Mixed 445
330% 439 MB/s
429 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 45,570,332 SSDs tested.

Typical PC SN520 SDAPNUW-512G-1114 512GB Builds (Compare 6,128 builds) See popular component choices, score breakdowns and rankings.
Gaming 11%
Tree trunk
Desktop 61%
Workstation 10%
Tree trunk

System: Acer Nitro AN515-43


Popular PC SN520 SDAPNUW-512G-1114 512GB 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) August 2021 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 i5-11600K $270Nvidia RTX 3070 $500Crucial MX500 250GB $45
Intel Core i5-11400F $260Nvidia RTX 3060-Ti $400Samsung 860 Evo 250GB $52
Intel Core i7-11700K $380Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $183
Seagate Barracuda 1TB (2016) $35Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $31Corsair Vengeance LPX DDR4 3000 C15 2x8GB $80SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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