TEST
YOUR SSD
ADD TO PC
BUILD

WDC

PC SN520 SDAPNUW-256G 256GB

▲ 500 ▼

Release date ≈ Q4 2018.

Average Bench: 139% (178th of 1080)

Based on 2,393 user benchmarks.  Model: WDC PC SN520 SDAPNUW-256G
Poor: 94%Average: 139% Great: 171%

Popular builds with this SSD

Outstanding average bench

The WDC PC SN520 SDAPNUW-256G 256GB averaged 38.7% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the WDC PC SN520 SDAPNUW-256G 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 625MB/s
Avg. 4K-64Thread Write Speed 663MB/s

Very poor consistency

The range of scores (95th - 5th percentile) for the WDC PC SN520 SDAPNUW-256G 256GB is 77.1%. This is a particularly wide range which indicates that the WDC PC SN520 SDAPNUW-256G 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 328MB/s
Avg. Sequential Mixed IO Speed 670MB/s
ADVERTISEMENT

Average Bench

(Based on 2,393 samples)
Rank 178139%
Min Avg Max
597 Read 826 1,136
306 Write 789 1,106
380 Mixed 670 961
187 SusWrite 328 447
146% 653 MB/s
Min Avg Max
20.3 4K Read 37.3 44.7
42.6 4K Write 102 140
22.1 4K Mixed 50.6 65.1
175% 63.4 MB/s
Min Avg Max
326 DQ Read 754 863
180 DQ Write 663 968
228 DQ Mixed 625 735
491% 681 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
79GB free (System drive)
Firmware: 20140000
SusWrite @10s intervals: 325 297 237 229 227 226 MB/s
153% Outstanding
Read 1,118
Write 965
Mixed 923
SusWrite 257
182% 816 MB/s
4K Read 40.7
4K Write 104
4K Mixed 56.4
189% 66.9 MB/s
DQ Read 854
DQ Write 685
DQ Mixed 738
561% 759 MB/s
69GB free (System drive)
Firmware: 20140000
SusWrite @10s intervals: 265 285 205 202 203 201 MB/s
143% Outstanding
Read 1,106
Write 912
Mixed 890
SusWrite 227
175% 783 MB/s
4K Read 36.3
4K Write 84.5
4K Mixed 49.8
164% 56.9 MB/s
DQ Read 859
DQ Write 659
DQ Mixed 726
552% 748 MB/s
155GB free (System drive)
Firmware: 20140000
SusWrite @10s intervals: 342 360 303 309 306 296 MB/s
131% Outstanding
Read 688
Write 624
Mixed 631
SusWrite 319
127% 566 MB/s
4K Read 36.5
4K Write 85.4
4K Mixed 50.2
165% 57.4 MB/s
DQ Read 811
DQ Write 677
DQ Mixed 695
534% 728 MB/s
136GB free (System drive)
Firmware: 20140000
SusWrite @10s intervals: 387 334 305 298 287 277 MB/s
119% Outstanding
Read 860
Write 1,064
Mixed 452
SusWrite 315
151% 673 MB/s
4K Read 27.7
4K Write 77.3
4K Mixed 43.3
138% 49.4 MB/s
DQ Read 638
DQ Write 340
DQ Mixed 457
348% 478 MB/s
140GB free (System drive)
Firmware: 20140000
SusWrite @10s intervals: 300 248 246 296 323 327 MB/s
115% Outstanding
Read 927
Write 1,014
Mixed 858
SusWrite 290
173% 772 MB/s
4K Read 31.6
4K Write 59.4
4K Mixed 42.3
134% 44.4 MB/s
DQ Read 548
DQ Write 289
DQ Mixed 306
258% 381 MB/s
81GB free (System drive)
Firmware: 20140000
SusWrite @10s intervals: 385 388 361 293 300 294 MB/s
111% Outstanding
Read 733
Write 977
Mixed 743
SusWrite 337
157% 697 MB/s
4K Read 14.4
4K Write 74.2
4K Mixed 39.6
112% 42.7 MB/s
DQ Read 662
DQ Write 473
DQ Mixed 536
409% 557 MB/s
2,393 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 76,510,428 SSDs tested

Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

CHOOSE A COMPONENT:

CPU GPU SSD HDD RAM MBD
Typical PC SN520 SDAPNUW-256G 256GB Builds (Compare 1,472 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 12%
Tree trunk
Desktop
Desktop 69%
Battle cruiser
Workstation
Workstation 11%
Tree trunk

Motherboard: MSI MS-17C5

CPU
Core i7-8750HIntelBench 70%, 442,631 samples1,467x
Xeon E-2176MIntelBench 77%, 4,000 samples3x
Core i5-8300HIntelBench 65%, 167,898 samples2x
GPU
UHD Graphics 630IntelBench 5%, 506,702 samples666x
GTX 1060 (Mobile)NvidiaBench 47%, 177,775 samples465x
GTX 1070 (Mobile)NvidiaBench 72%, 73,882 samples337x
SSD
PC SN520 SDAPNUW-256G 256GBWDCBench 139%, 2,393 samples120x
RAM
M471A1K43CB1-CTD 2x8GBSamsungBench 76%, 108,106 samples314x
M471A1K43CB1-CRC 2x8GBSamsungBench 70%, 62,266 samples90x
M471A2K43CB1-CTD 1x16GBSamsungBench 44%, 44,819 samples87x
EDIT WITH CUSTOM PC BUILDER

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

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

Welcome to our 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 value for money upgrades.

UserBenchmark of the month

Gaming Desktop ProGaming

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) July 2024 SSD Rankings

Welcome to our 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]

ADVERTISEMENT

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

Added n/a ago.
Your
opinion?
▲Like ▼Dislike
Ready to retire
Age: 5 years

Speed Comparisons

vs WD Black SN850X M.2 2TB
vs WD Black SN850X M.2 1TB
vs Crucial T700 M.2 4TB
vs WD Black SN850X M.2 4TB
vs Samsung 990 Pro M.2 2TB
vs Samsung 990 Pro M.2 4TB
vs Samsung 990 Pro M.2 1TB
vs Crucial T705 M.2 2TB
vs Crucial T705 M.2 1TB

1080 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

Storage Devices FAQ
What is sustained sequential write speed?
What’s the difference between SLC, MLC and TLC?
What is 3D XPoint and how fast is it?
What’s the difference between SATA, PCIe and NVMe?
What’s the difference between NAND and V-NAND?
What is sequential write speed?
What is sequential read speed?
What is incompressible data?
What is queue depth?
Solid State Drives
What is the SSD value for money rating?
What is 4K 64 thread write speed?
Can CPU power saving states (C1,C2,C3) impact SSD speed?
What is the effective SSD speed index?
How is the AS SSD write score calculated?
How is the AS SSD read score calculated?
How is the AS SSD total score calculated?
ALL FAQs »

 Best User Rated
Why does UserBenchmark have a bad reputation on reddit?
Marketers operate thousands of reddit accounts. Our benchmarks expose their spiel so they attack our reputation.
Why don’t PC brands endorse UserBenchmark?
Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
Why don’t youtubers promote UserBenchmark?
We don't pay youtubers, so they don't praise us. Moreover, our data obstructs youtubers who promote overpriced or inferior products.
Why does UserBenchmark have negative trustpilot reviews?
The 200+ trustpilot reviews are mostly written by virgin marketing accounts. Real users don't give a monkey's about big brands.
Why is UserBenchmark popular with users?
Instead of pursuing brands for sponsorship, we've spent 13 years publishing real-world data for users.
The Best
CPUGPUSSD
Intel Core i5-12600K $175Nvidia RTX 4060 $293WD Black SN850X M.2 2TB $145
Intel Core i5-12400F $110Nvidia RTX 4060-Ti $389WD Black SN850X M.2 1TB $85
Intel Core i5-13600K $235Nvidia RTX 4070 $499Crucial T700 M.2 4TB $342
Today's hottest
Amazon Ebay
deals
If you buy something via a price link, UserBenchmark may earn a commission
Build Test EFps
Can You Run It?
►
YouTube
*NEW*
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer  •  YouTube Feedback