Average Bench: 117% (1st of 1015)

more Based on 2,766 user benchmarks.  Models: WDC WD6003FZBX-00K5WB0, WDC WD60 03FZBX-00K5W, WDC WD60 03FZBX-00K5WB0, WDC WD6003FZBX-00K5W, WDC WD6003FZBX-0, WDC WD60 03FZBX-00GXAB0, WDC WD6003FZBX-00GXAB0

Outstanding average bench

The WD WD6003FZBX-00K5WB0 6TB averaged 17.0% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the WD WD6003FZBX-00K5WB0 6TB near the top of the comparison list.


Avg. 4K Random Mixed IO Speed 1.67MB/s
Avg. 4K Random Write Speed 6.01MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the WD WD6003FZBX-00K5WB0 6TB is 62.9%. This is a particularly wide range which indicates that the WD WD6003FZBX-00K5WB0 6TB performs inconsistently under varying real world conditions.


Avg. Sequential Mixed IO Speed 96.4MB/s
Avg. Sustained Write Speed 203MB/s

Average Bench

(Based on 2,766 samples)
Min Avg Max
119 Read 204 243
126 Write 207 246
62 Mixed 96.4 112
112 SusWrite 203 244
130% 178 MB/s
Min Avg Max
0.8 4K Read 1.51 2
3.4 4K Write 6.01 7.7
1 4K Mixed 1.67 2
359% 3.06 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
4.5TB free
Firmware: 01.01A01
SusWrite @10s intervals: 231 228 234 230 230 232 MB/s
Read 228
Write 232
Mixed 104
SusWrite 231
145% 199 MB/s
4K Read 1.4
4K Write 4.5
4K Mixed 1.7
331% 2.53 MB/s
3.5TB free
Firmware: 01.01A01
SusWrite @10s intervals: 236 224 233 241 219 231 MB/s
Read 208
Write 216
Mixed 105
SusWrite 231
139% 190 MB/s
4K Read 1.6
4K Write 5.2
4K Mixed 1.7
352% 2.83 MB/s
3TB free
Firmware: 01.01A01
SusWrite @10s intervals: 196 192 196 196 193 195 MB/s
Read 201
Write 198
Mixed 95.3
SusWrite 195
126% 172 MB/s
4K Read 1.6
4K Write 7
4K Mixed 1.9
407% 3.5 MB/s
4TB free
Firmware: 01.01A01
SusWrite @10s intervals: 186 181 182 187 182 179 MB/s
Read 196
Write 188
Mixed 93.5
SusWrite 183
121% 165 MB/s
4K Read 1.5
4K Write 7.4
4K Mixed 1.5
366% 3.47 MB/s
2,766 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 31,825,334 HDDs tested.

Typical WD6003FZBX-00K5WB0 6TB Builds (Compare 14,637 builds) See popular component choices, score breakdowns and rankings.
Gaming 174%
Desktop 102%
Workstation 164%

Motherboard: Asus ROG STRIX Z390-E GAMING - $326

EDIT WITH CUSTOM PC BUILDER Value: 51% - Above average Total price: $2,248

Popular WD6003FZBX-00K5WB0 6TB compatible motherboards:

How Fast Is Your HDD? (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.
  • - 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.
  • - Share your opinion by voting.
Hard Drive Rankings (Price vs Performance) October 2020 HDD Rankings.

We calculate effective speed which measures performance for typical consumers. Effective speed is adjusted by current cost per GB to yield value for money. 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 HDDs. [HDrivePro]


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.


Added n/a ago.

Excellent (edit your comment) Add link

6 months ago.

Very large capacity, fast, lasts a long time.


23 months ago.

It's almost as fast as an SSD

1015 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different HDDs 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 i5-9600K $180Nvidia GTX 1660S (Super) $230Crucial MX500 250GB $45
Intel Core i5-9400F $140Nvidia RTX 3080 $700Samsung 850 Evo 120GB $78
Intel Core i5-10600K $260Nvidia GTX 1650S (Super) $170Samsung 860 Evo 250GB $50
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3200 C16 2x8GB $63SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $69SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $548SanDisk Extreme 16GB $28
Today's hottest deals
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer  •  YouTube Feedback