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WD

WD4000AAKB-00UKA0 400GB

▲ 500 ▼

Release date ≈ Q2 2014.

Average Bench: 29.6% (742nd of 1015)

more Based on 50 user benchmarks.  Models: WDC WD4000AAKB-00UKA0, WDC WD4000AAKB-00YSA0, WDC WD40 00AAKB-00UKA0, WDC WD4000AAKB-22UKA0, WDC WD4000AAKB-00UKA, WDC WD40 00AAKB-00YSA0
Poor: 7%Average: 29.6% Great: 42%

Popular builds with this HDD

Very poor average bench

The WD WD4000AAKB-00UKA0 400GB averaged 70.3% lower than the peak scores attained by the group leaders. This isn't a great result which indicates that there are much faster alternatives on the comparison list.

Strengths

Avg. 4K Random Mixed IO Speed 0.62MB/s
Avg. 4K Random Write Speed 1.92MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the WD WD4000AAKB-00UKA0 400GB is 34.3%. This is a relatively narrow range which indicates that the WD WD4000AAKB-00UKA0 400GB performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 35.2MB/s
Avg. Sustained Write Speed 45.3MB/s
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Average Bench

(Based on 50 samples)
Rank 74229.6%
Min Avg Max
1.5 Read 54.8 76.5
1.5 Write 50.2 75.7
1.5 Mixed 35.2 70.1
1.5 SusWrite 45.3 76.5
34.2% 46.4 MB/s
Min Avg Max
0.05 4K Read 0.57 0.73
0.22 4K Write 1.92 2.5
0.06 4K Mixed 0.62 1
128% 1.03 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
353GB free
Firmware: 07.01N01
SusWrite @10s intervals: 76 76 75 77 77 77 MB/s
42.6% Average
Read 71.3
Write 72.9
Mixed 44.2
SusWrite 76.5
49% 66.2 MB/s
4K Read 0.7
4K Write 2.4
4K Mixed 0.8
162% 1.3 MB/s
320GB free
Firmware: 07.01N01
SusWrite @10s intervals: 74 74 75 76 76 75 MB/s
41.7% Average
Read 69.9
Write 68.6
Mixed 43.4
SusWrite 75
47% 64.2 MB/s
4K Read 0.5
4K Write 2.3
4K Mixed 0.7
141% 1.17 MB/s
222GB free
Firmware: 07.01N01
SusWrite @10s intervals: 64 70 70 69 70 69 MB/s
39% Below average
Read 66.6
Write 65.8
Mixed 42.5
SusWrite 68.7
45% 60.9 MB/s
4K Read 0.7
4K Write 2.2
4K Mixed 0.8
159% 1.23 MB/s
151GB free
Firmware: 07.01N01
SusWrite @10s intervals: 59 60 60 59 59 60 MB/s
33.8% Below average
Read 58
Write 59.2
Mixed 39
SusWrite 59.4
40% 53.9 MB/s
4K Read 0.7
4K Write 1.8
4K Mixed 0.7
140% 1.07 MB/s
324GB free (System drive)
Firmware: 07.01N01
SusWrite @10s intervals: 53 60 58 58 49 3.3 MB/s
31.6% Below average
Read 63.5
Write 13
Mixed 27.3
SusWrite 46.7
28% 37.6 MB/s
4K Read 0.5
4K Write 0.7
4K Mixed 0.7
112% 0.63 MB/s
152GB free (System drive)
Firmware: 07.01N01
SusWrite @10s intervals: 43 46 52 51 55 57 MB/s
29.4% Poor
Read 51.2
Write 55.1
Mixed 37.3
SusWrite 50.6
36% 48.6 MB/s
4K Read 0.7
4K Write 2.2
4K Mixed 0.8
159% 1.23 MB/s
355GB free (System drive)
Firmware: 07.01N01
SusWrite @10s intervals: 24 28 27 29 29 28 MB/s
16.2% Very poor
Read 28.1
Write 28.2
Mixed 25.1
SusWrite 27.6
20% 27.2 MB/s
4K Read 0.6
4K Write 2.3
4K Mixed 0.8
156% 1.23 MB/s
165GB free
Firmware: 07.01N01
SusWrite @10s intervals: 3.9 3.9 3.9 3.9 3.9 3.9 MB/s
2.38% Terrible
Read 3.7
Write 3.5
Mixed 3.7
SusWrite 3.9
3% 3.7 MB/s
4K Read 0.6
4K Write 1.6
4K Mixed 0.7
132% 0.97 MB/s
50 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 53,298,887 HDDs 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 WD4000AAKB-00UKA0 400GB Builds (Compare 446 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 21%
Surfboard
Desktop
Desktop 71%
Battleship
Workstation
Workstation 16%
Surfboard

Motherboard: Asus P7H55-M

CPU
Core i5 760Intel  $100Bench 64%, 34,495 samples94x
Core i3 540Intel  $60Bench 46%, 24,563 samples71x
Core i7 870Intel  $100Bench 66%, 37,228 samples59x
GPU
GTX 1050-TiNvidia  $59Bench 29%, 946,701 samples32x
GT 1030NvidiaBench 14%, 185,384 samples18x
HD Graphics (Clarkdale 0.733/0.9 GHz)IntelBench 1%, 20,588 samples17x
SSD
A400 240GBKingston  $28Bench 66%, 424,288 samples24x
A400 120GBKingston  $32Bench 61%, 166,392 samples18x
A400 480GBKingston  $38Bench 74%, 237,487 samples11x
RAM
8GBUnknownBench 34%, 82,857 samples161x
16GBUnknownBench 41%, 70,565 samples118x
12GBUnknownBench 35%, 85,415 samples51x
EDIT WITH CUSTOM PC BUILDER Value: 85% - Excellent Total price: $187

Popular WD4000AAKB-00UKA0 400GB compatible motherboards:

How Fast Is Your HDD? (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.

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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
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  • - Reports are generated and presented on userbenchmark.com
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Hard Drive Rankings (Price vs Performance) April 2024 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]

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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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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

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?
What is 4K random write speed?
What is 4K random read speed?
What is AS SSD real world copy speed?
How big is 16GB?
What does MBps mean?
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ALL FAQs »

 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $273Nvidia RTX 4060 $300Crucial MX500 250GB $40
Intel Core i5-12400F $131Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $186Nvidia RTX 4070 $409Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $34Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair 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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