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SN520 NVMe WDC 256GB

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Release date ≈ Q4 2018.

Average Bench: 137% (172nd of 1072)

Based on 4,380 user benchmarks.  Model: PC SN520 NVMe WDC 256GB
Poor: 82%Average: 137% Great: 184%

Popular builds with this SSD

Outstanding average bench

The PC SN520 NVMe WDC 256GB averaged 36.7% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the PC SN520 NVMe WDC 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 530MB/s
Avg. 4K-64Thread Read Speed 654MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the PC SN520 NVMe WDC 256GB is 102%. This is a particularly wide range which indicates that the PC SN520 NVMe WDC 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 321MB/s
Avg. 4K Random Write Speed 100MB/s
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Average Bench

(Based on 4,380 samples)
Rank 172137%
Min Avg Max
486 Read 896 1,199
224 Write 805 1,187
334 Mixed 687 1,014
163 SusWrite 321 441
152% 677 MB/s
Min Avg Max
20.7 4K Read 41.5 47.2
33.8 4K Write 100 156
23.9 4K Mixed 50.8 68.7
181% 64.2 MB/s
Min Avg Max
178 DQ Read 654 857
94.8 DQ Write 504 967
144 DQ Mixed 530 731
410% 563 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
81GB free (System drive)
Firmware: 20220012 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 300 264 231 225 220 218 MB/s
149% Outstanding
Read 1,003
Write 1,165
Mixed 1,070
SusWrite 243
196% 870 MB/s
4K Read 38.6
4K Write 105
4K Mixed 55.4
185% 66.2 MB/s
DQ Read 827
DQ Write 837
DQ Mixed 392
416% 686 MB/s
187GB free (System drive)
Firmware: 20220012 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 454 463 419 423 423 426 MB/s
148% Outstanding
Read 878
Write 867
Mixed 723
SusWrite 435
163% 726 MB/s
4K Read 28.8
4K Write 108
4K Mixed 56.5
173% 64.6 MB/s
DQ Read 784
DQ Write 624
DQ Mixed 726
537% 711 MB/s
57GB free (System drive)
Firmware: 20240012 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 476 420 414 417 423 419 MB/s
105% Outstanding
Read 703
Write 700
Mixed 610
SusWrite 428
137% 610 MB/s
4K Read 23.8
4K Write 73.3
4K Mixed 22.1
103% 39.7 MB/s
DQ Read 539
DQ Write 358
DQ Mixed 490
354% 462 MB/s
31GB free (System drive)
Firmware: 20220012 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 140 169 172 153 156 136 MB/s
86.4% Excellent
Read 651
Write 216
Mixed 323
SusWrite 154
74% 336 MB/s
4K Read 15.6
4K Write 98.4
4K Mixed 22.4
104% 45.5 MB/s
DQ Read 679
DQ Write 207
DQ Mixed 317
267% 401 MB/s
98GB free (System drive)
Firmware: 20240012 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 238 191 209 213 205 200 MB/s
85.9% Excellent
Read 806
Write 744
Mixed 618
SusWrite 209
133% 594 MB/s
4K Read 20.7
4K Write 48
4K Mixed 29.1
94% 32.6 MB/s
DQ Read 266
DQ Write 246
DQ Mixed 289
208% 267 MB/s
4,380 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,731,247 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 SN520 NVMe WDC 256GB Builds (Compare 2,135 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 7%
Tree trunk
Desktop
Desktop 58%
Gunboat
Workstation
Workstation 7%
Tree trunk

System: Dell Latitude 5400

CPU
Core i5-8365UIntelBench 57%, 8,737 samples926x
Core i7-8665UIntelBench 60%, 10,156 samples699x
Core i5-8265UIntelBench 53%, 87,841 samples411x
GPU
UHD Graphics 620IntelBench 5%, 178,291 samples2,036x
UHD Graphics 620 (Mobile Kaby Lake R)IntelBench 5%, 420,154 samples90x
GTX 1660-TiNvidia  $143Bench 76%, 318,562 samples2x
SSD
SN520 NVMe WDC 256GBPCBench 137%, 4,380 samples111x
RAM
HMA81GS6JJR8N-VK 1x8GBUnknownBench 40%, 7,726 samples195x
HMA82GS6JJR8N-VK 1x16GBUnknownBench 43%, 5,210 samples192x
HMA82GS6DJR8N-VK 1x16GBUnknownBench 42%, 1,772 samples181x
EDIT WITH CUSTOM PC BUILDER

Popular SN520 NVMe WDC 256GB systems:

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) April 2024 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.

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Speed Comparisons

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1072 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
The Best.
CPUGPUSSD
Intel Core i5-13600K $269Nvidia RTX 4060 $295Crucial MX500 250GB $40
Intel Core i5-12400F $133Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $178Nvidia RTX 4070 $539Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $45SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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