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WD6400AAKS-22A7B 640GB

▲ 500 ▼

Release date ≈ Q4 2015.

Average Bench: 52.7% (272nd of 1015)

Based on 61 user benchmarks.  Model: WD WD6400AAKS-22A7B
Poor: 41%Average: 52.7% Great: 62%

Popular builds with this HDD

Average average bench

The WD WD6400AAKS-22A7B 640GB averaged 47.2% 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 0.56MB/s
Avg. 4K Random Write Speed 1.97MB/s

Good consistency

The range of scores (95th - 5th percentile) for the WD WD6400AAKS-22A7B 640GB is 20.7%. This is a relatively narrow range which indicates that the WD WD6400AAKS-22A7B 640GB performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. Sustained Write Speed 87.4MB/s
Avg. Sequential Write Speed 87.7MB/s
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Average Bench

(Based on 61 samples)
Rank 27252.7%
Min Avg Max
62.9 Read 96.4 117
63.4 Write 87.7 104
51.5 Mixed 79.4 102
55 SusWrite 87.4 111
65% 87.7 MB/s
Min Avg Max
0.4 4K Read 0.63 0.8
0.71 4K Write 1.97 2.5
0.25 4K Mixed 0.56 1
125% 1.06 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
594GB free
Firmware: 01.03B01
SusWrite @10s intervals: 111 109 113 112 112 112 MB/s
62.5% Good
Read 106
Write 109
Mixed 72.5
SusWrite 112
73% 99.7 MB/s
4K Read 0.7
4K Write 2.5
4K Mixed 1
187% 1.4 MB/s
437GB free
Firmware: 01.03B01
SusWrite @10s intervals: 99 103 106 106 105 105 MB/s
59.7% Above average
Read 104
Write 106
Mixed 69
SusWrite 104
70% 95.8 MB/s
4K Read 0.7
4K Write 2.2
4K Mixed 0.9
170% 1.27 MB/s
551GB free
Firmware: 01.03B01
SusWrite @10s intervals: 103 107 106 104 103 106 MB/s
59.6% Above average
Read 103
Write 98.2
Mixed 65
SusWrite 105
68% 92.6 MB/s
4K Read 0.8
4K Write 2.7
4K Mixed 1
194% 1.5 MB/s
302GB free
Firmware: 01.0
SusWrite @10s intervals: 87 96 97 98 98 88 MB/s
54.3% Above average
Read 95.2
Write 89.3
Mixed 62
SusWrite 93.8
63% 85.1 MB/s
4K Read 0.7
4K Write 2
4K Mixed 0.9
166% 1.2 MB/s
240GB free
Firmware: 01.0
SusWrite @10s intervals: 93 94 93 93 93 76 MB/s
52.3% Above average
Read 91.7
Write 90
Mixed 60.3
SusWrite 90.4
61% 83.1 MB/s
4K Read 0.7
4K Write 1.9
4K Mixed 0.9
164% 1.17 MB/s
283GB free
Firmware: 01.03B01
SusWrite @10s intervals: 81 85 83 82 82 85 MB/s
49.4% Average
Read 88.7
Write 76.3
Mixed 59.4
SusWrite 83
57% 76.8 MB/s
4K Read 0.6
4K Write 2.4
4K Mixed 1
180% 1.33 MB/s
286GB free
Firmware: 01.0
SusWrite @10s intervals: 73 72 71 71 72 75 MB/s
43% Average
Read 77
Write 70.3
Mixed 54.8
SusWrite 72.3
51% 68.6 MB/s
4K Read 0.7
4K Write 2.3
4K Mixed 0.9
172% 1.3 MB/s
38GB free
Firmware: 01.03B01
SusWrite @10s intervals: 78 78 79 78 76 78 MB/s
40.4% Average
Read 62.1
Write 62.9
Mixed 47.4
SusWrite 78
46% 62.6 MB/s
4K Read 0.6
4K Write 2.4
4K Mixed 0.8
158% 1.27 MB/s
61 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 53,339,094 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 WD6400AAKS-22A7B 640GB Builds (Compare 7,111 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 86%
Aircraft carrier
Desktop
Desktop 87%
Aircraft carrier
Workstation
Workstation 72%
Battleship

Motherboard: Asus MAXIMUS VIII HERO - $240

CPU
Core i7-6700KIntel  $180Bench 81%, 588,978 samples4,559x
Core i5-6600KIntel  $130Bench 72%, 342,244 samples843x
Core i7-7700KIntel  $230Bench 84%, 712,312 samples597x
GPU
GTX 1080Nvidia  $400Bench 102%, 1,082,454 samples992x
GTX 1070Nvidia  $132Bench 80%, 1,459,281 samples893x
GTX 1080-TiNvidia  $485Bench 124%, 840,268 samples470x
SSD
850 Evo 500GBSamsung  $90Bench 112%, 695,664 samples442x
850 Evo 250GBSamsung  $100Bench 103%, 951,591 samples314x
860 Evo 1TBSamsung  $130Bench 112%, 602,853 samples180x
RAM
Vengeance LPX DDR4 3000 C15 2x8GBCorsair  $43Bench 82%, 606,405 samples346x
Vengeance LPX DDR4 3200 C16 2x8GBCorsair  $45Bench 85%, 653,654 samples254x
Ripjaws V DDR4 2400 C15 2x8GBG.SKILL  $31Bench 71%, 98,777 samples137x
EDIT WITH CUSTOM PC BUILDER Value: 70% - Good Total price: $953

Popular WD6400AAKS-22A7B 640GB 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.

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
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.

 Comments

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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?
Hard Drives
What is the Hard Drive value for money rating?
What is effective Hard Drive speed?
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 $177Nvidia 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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