Average Bench: 115% (1st of 1015)

more Based on 5,011 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 15.3% 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 1.61MB/s
Avg. 4K Random Write Speed 5.99MB/s

Very poor consistency

The range of scores (95th - 5th percentile) for the WD WD6003FZBX-00K5WB0 6TB is 71.4%. 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 93.7MB/s
Avg. Sequential Read Speed 198MB/s

Average Bench

(Based on 5,011 samples)
Min Avg Max
107 Read 198 244
114 Write 201 244
58 Mixed 93.7 112
117 SusWrite 202 242
127% 174 MB/s
Min Avg Max
0.6 4K Read 1.46 1.9
3.7 4K Write 5.99 7.9
0.8 4K Mixed 1.61 1.9
350% 3.02 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
5.5TB free (System drive)
Firmware: 01.01A01
SusWrite @10s intervals: 191 221 237 214 234 210 MB/s
Read 230
Write 240
Mixed 106
SusWrite 218
145% 198 MB/s
4K Read 1.4
4K Write 7.9
4K Mixed 1.6
382% 3.63 MB/s
3TB free
Firmware: 01.01A01
SusWrite @10s intervals: 63 211 207 213 215 211 MB/s
Read 208
Write 135
Mixed 100
SusWrite 187
116% 158 MB/s
4K Read 1.5
4K Write 4.3
4K Mixed 1.7
331% 2.5 MB/s
903GB free
Firmware: 01.01A01
SusWrite @10s intervals: 178 182 181 181 182 180 MB/s
Read 180
Write 184
Mixed 96.1
SusWrite 181
117% 160 MB/s
4K Read 1.4
4K Write 7
4K Mixed 1.8
388% 3.4 MB/s
5,011 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 39,651,430 HDDs tested.

Typical WD6003FZBX-00K5WB0 6TB Builds (Compare 23,913 builds) See popular component choices, score breakdowns and rankings.
Gaming 167%
Desktop 101%
Workstation 157%

Motherboard: Asus ROG STRIX Z390-E GAMING - $399

EDIT WITH CUSTOM PC BUILDER Value: 45% - Average Total price: $2,535

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.
  • - 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.
Hard Drive Rankings (Price vs Performance) July 2021 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

15 months ago.

Very large capacity, fast, lasts a long time.


2 years 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 i5-11400F $239Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11600K $270Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-10700K $304Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $78
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $29Corsair Vengeance LPX DDR4 3000 C15 2x8GB $85SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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