Average Bench: 146% (115th of 1012)

Based on 1,741 user benchmarks.  Model: WDC PC SN520 SDAPMUW-256G-1101

Outstanding average bench

The WDC PC SN520 SDAPMUW-256G-1101 256GB averaged 46.4% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the WDC PC SN520 SDAPMUW-256G-1101 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 613MB/s
Avg. 4K-64Thread Write Speed 636MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the WDC PC SN520 SDAPMUW-256G-1101 256GB is 64%. This is a particularly wide range which indicates that the WDC PC SN520 SDAPMUW-256G-1101 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 407MB/s
Avg. 4K Random Read Speed 36.7MB/s
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Average Bench

(Based on 1,741 samples)
Min Avg Max
639 Read 906 1,190
592 Write 855 1,153
515 Mixed 748 1,001
296 SusWrite 407 447
163% 729 MB/s
Min Avg Max
17.9 4K Read 36.7 46.8
60.7 4K Write 111 154
24.6 4K Mixed 50.3 67.6
179% 66.1 MB/s
Min Avg Max
395 DQ Read 723 859
284 DQ Write 636 955
358 DQ Mixed 613 732
478% 657 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
160GB free
Firmware: 20210001
SusWrite @10s intervals: 619 430 432 431 432 408 MB/s
Read 1,076
Write 1,177
Mixed 948
SusWrite 458
206% 915 MB/s
4K Read 41.7
4K Write 126
4K Mixed 56.8
203% 74.8 MB/s
DQ Read 854
DQ Write 773
DQ Mixed 725
568% 784 MB/s
123GB free (System drive)
Firmware: 20240001
SusWrite @10s intervals: 534 327 354 344 350 361 MB/s
Read 1,198
Write 1,167
Mixed 1,000
SusWrite 378
210% 936 MB/s
4K Read 41.7
4K Write 126
4K Mixed 54.4
200% 74.1 MB/s
DQ Read 860
DQ Write 730
DQ Mixed 499
455% 697 MB/s
213GB free (System drive)
Firmware: 20210001
SusWrite @10s intervals: 572 423 418 424 423 424 MB/s
Read 734
Write 696
Mixed 674
SusWrite 447
143% 638 MB/s
4K Read 32.9
4K Write 142
4K Mixed 57.1
198% 77.2 MB/s
DQ Read 847
DQ Write 847
DQ Mixed 725
578% 806 MB/s
199GB free (System drive)
Firmware: 20240001
SusWrite @10s intervals: 561 420 422 423 424 424 MB/s
Read 1,113
Write 1,125
Mixed 980
SusWrite 446
206% 916 MB/s
4K Read 40.2
4K Write 100
4K Mixed 43.5
170% 61.3 MB/s
DQ Read 696
DQ Write 639
DQ Mixed 669
501% 668 MB/s
201GB free (System drive)
Firmware: 20240001
SusWrite @10s intervals: 525 417 418 419 419 418 MB/s
Read 1,057
Write 1,083
Mixed 888
SusWrite 436
194% 866 MB/s
4K Read 30.6
4K Write 110
4K Mixed 43.2
160% 61.1 MB/s
DQ Read 777
DQ Write 623
DQ Mixed 657
504% 686 MB/s
86GB free (System drive)
Firmware: 20240001
SusWrite @10s intervals: 382 446 418 419 425 424 MB/s
Read 676
Write 784
Mixed 644
SusWrite 419
142% 631 MB/s
4K Read 40
4K Write 122
4K Mixed 54.9
195% 72.2 MB/s
DQ Read 800
DQ Write 642
DQ Mixed 689
524% 710 MB/s
104GB free (System drive)
Firmware: 20110001
SusWrite @10s intervals: 353 351 280 274 264 270 MB/s
Read 930
Write 1,051
Mixed 520
SusWrite 299
157% 700 MB/s
4K Read 37.3
4K Write 107
4K Mixed 53.6
182% 65.9 MB/s
DQ Read 338
DQ Write 680
DQ Mixed 349
311% 456 MB/s
99GB free (System drive)
Firmware: 20210001
SusWrite @10s intervals: 367 293 309 305 303 306 MB/s
Read 979
Write 864
Mixed 659
SusWrite 314
157% 704 MB/s
4K Read 20.4
4K Write 64.4
4K Mixed 40.7
117% 41.8 MB/s
DQ Read 501
DQ Write 420
DQ Mixed 647
434% 523 MB/s
1,741 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 20,095,342 SSDs tested.

EDIT WITH CUSTOM PC BUILDER

Popular PC SN520 SDAPMUW-256G-1101 256GB systems:

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Solid State Drive Rankings (Price vs Performance) December 2019 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]

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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.

 Comments

1012 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

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Intel Core i7-9700K $369Nvidia GTX 1650S (Super) $160Samsung 850 Pro 512GB $230
HDDRAMUSB
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $65SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $38Corsair Vengeance LPX DDR4 3000 C15 2x8GB $63SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $613SanDisk Extreme 16GB $24
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