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Nvme

WDC PC SN520 SDA 256GB

▲ 501 ▼

Release date ≈ Q4 2018.

Average Bench: 148% (167th of 1079)

Based on 3,002 user benchmarks.  Model: NVMe WDC PC SN520 SDA
Poor: 102%Average: 148% Great: 179%

Popular builds with this SSD

Outstanding average bench

The Nvme WDC PC SN520 SDA 256GB averaged 47.6% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Nvme WDC PC SN520 SDA 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Mixed IO Speed 588MB/s
Avg. 4K-64Thread Read Speed 731MB/s

Very poor consistency

The range of scores (95th - 5th percentile) for the Nvme WDC PC SN520 SDA 256GB is 76.7%. This is a particularly wide range which indicates that the Nvme WDC PC SN520 SDA 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 358MB/s
Avg. 4K Random Write Speed 109MB/s

Average Bench

(Based on 3,002 samples)
Rank 167148%
Min Avg Max
662 Read 978 1,237
450 Write 1,029 1,226
403 Mixed 844 1,104
206 SusWrite 358 447
180% 802 MB/s
Min Avg Max
21.2 4K Read 41.6 47.4
62.2 4K Write 109 156
24.4 4K Mixed 52.7 67.5
188% 67.7 MB/s
Min Avg Max
412 DQ Read 731 858
215 DQ Write 568 852
224 DQ Mixed 588 730
457% 629 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
191GB free (System drive)
Firmware: 0000 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 421 409 405 376 410 422 MB/s
159% Outstanding
Read 1,164
Write 1,213
Mixed 1120
SusWrite 407
219% 976 MB/s
4K Read 41.3
4K Write 114
4K Mixed 56.9
196% 70.6 MB/s
DQ Read 811
DQ Write 383
DQ Mixed 666
476% 620 MB/s
169GB free (System drive)
Firmware: 0000 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 468 467 420 420 425 426 MB/s
136% Outstanding
Read 911
Write 1,127
Mixed 1,031
SusWrite 438
198% 877 MB/s
4K Read 34.8
4K Write 70
4K Mixed 45.5
148% 50.1 MB/s
DQ Read 703
DQ Write 504
DQ Mixed 460
383% 556 MB/s
117GB free (System drive)
Firmware: 20110000 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 427 280 281 273 286 277 MB/s
117% Outstanding
Read 971
Write 1,108
Mixed 821
SusWrite 304
180% 801 MB/s
4K Read 34.1
4K Write 73.6
4K Mixed 43.8
147% 50.5 MB/s
DQ Read 362
DQ Write 242
DQ Mixed 314
231% 306 MB/s
125GB free (System drive)
Firmware: 20110000 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 333 294 253 258 255 252 MB/s
114% Outstanding
Read 943
Write 1136
Mixed 1,026
SusWrite 274
190% 845 MB/s
4K Read 33.4
4K Write 64.8
4K Mixed 44.3
142% 47.5 MB/s
DQ Read 371
DQ Write 306
DQ Mixed 335
252% 338 MB/s
98GB free (System drive)
Firmware: 0000 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 315 259 261 260 235 200 MB/s
90.6% Outstanding
Read 634
Write 794
Mixed 774
SusWrite 255
139% 614 MB/s
4K Read 24.3
4K Write 49.9
4K Mixed 32.6
105% 35.6 MB/s
DQ Read 478
DQ Write 281
DQ Mixed 339
263% 366 MB/s
65GB free (System drive)
Firmware: 20110000 Max speed: PCIe 16,000 MB/s
SusWrite @10s intervals: 250 250 243 234 212 240 MB/s
88% Excellent
Read 502
Write 290
Mixed 354
SusWrite 238
77% 346 MB/s
4K Read 22.7
4K Write 65.7
4K Mixed 36.7
116% 41.7 MB/s
DQ Read 505
DQ Write 253
DQ Mixed 258
224% 339 MB/s
3,002 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 76,955,188 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 WDC PC SN520 SDA 256GB Builds (Compare 760 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 8%
Tree trunk
Desktop
Desktop 64%
Destroyer
Workstation
Workstation 8%
Tree trunk

System: Asus TUF Gaming FX505GD_FX505GD

CPU
Core i5-8300HIntelBench 65%, 167,898 samples474x
Core i7-8750HIntelBench 70%, 442,631 samples286x
GPU
UHD Graphics 630IntelBench 5%, 506,702 samples425x
GTX 1050 (Mobile)NvidiaBench 23%, 160,694 samples335x
SSD
WDC PC SN520 SDA 256GBNvmeBench 148%, 3,002 samples63x
RAM
M471A1K43CB1-CTD 1x8GBSamsungBench 40%, 96,646 samples220x
HMA81GS6CJR8N-VK 1x8GBHynixBench 40%, 73,050 samples99x
M471A2K43CB1-CTD 1x16GBSamsungBench 44%, 44,819 samples43x
EDIT WITH CUSTOM PC BUILDER

Popular WDC PC SN520 SDA 256GB systems:

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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?
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The Best
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Intel Core i5-12600K $169Nvidia RTX 4060 $285WD Black SN850X M.2 2TB $146
Intel Core i5-12400F $112Nvidia RTX 4060-Ti $372WD Black SN850X M.2 1TB $75
Intel Core i5-13600K $248Nvidia RTX 4070 $278Crucial T700 M.2 4TB $350
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