Average Bench: 39.3% (524th of 1014)

more Based on 5,710 user benchmarks.  Models: WDC WD6400AACS-00G8B1, WDC WD64 00AACS-00M3B, WDC WD6400AACS-00G8B0, WDC WD6400AACS-0, WDC WD6400AACS-00M3B, WDC WD64 00AACS-32D6B, WDC WD6400AACS-00D6B1, WDC WD64 00AACS-00M3B0, WDC WD6400AACS-00A7B2, WDC WD6400AACS-00G8B, WDC WD6400AACS-00D6B, WDC WD64 00AACS-00G8B, WDC WD64 00AACS-00G8B0, WDC WD6400AACS-32D6B1, WDC WD64 00AACS-00D6B, WDC WD64 00AACS-00G8B1, WDC WD64 00AACS-00D6B1, WDC WD6400AACS-00M3B0

Poor average bench

The WD WD6400AACS-00G8B1 640GB averaged 60.6% 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 0.74MB/s
Avg. 4K Random Write Speed 2.09MB/s

Good consistency

The range of scores (95th - 5th percentile) for the WD WD6400AACS-00G8B1 640GB is 25%. This is a relatively narrow range which indicates that the WD WD6400AACS-00G8B1 640GB performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 48.5MB/s
Avg. Sustained Write Speed 65.7MB/s
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Average Bench

(Based on 5,710 samples)
Min Avg Max
40.7 Read 70.9 90.6
38.3 Write 67.9 88.5
30.5 Mixed 48.5 58.5
35.8 SusWrite 65.7 86
46.6% 63.3 MB/s
Min Avg Max
0.4 4K Read 0.55 0.6
1.13 4K Write 2.09 2.6
0.5 4K Mixed 0.74 0.9
144% 1.13 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
596GB free
Firmware: 05.04C05
SusWrite @10s intervals: 81 82 81 83 82 82 MB/s
Read 83.2
Write 82.5
Mixed 54.3
SusWrite 81.6
56% 75.4 MB/s
4K Read 0.6
4K Write 2.4
4K Mixed 0.9
169% 1.3 MB/s
482GB free
Firmware: 05.04C05
SusWrite @10s intervals: 80 81 84 85 85 85 MB/s
Read 75.1
Write 79.5
Mixed 53.7
SusWrite 83.5
54% 72.9 MB/s
4K Read 0.5
4K Write 2.3
4K Mixed 0.7
141% 1.17 MB/s
388GB free
Firmware: 05.04C05
SusWrite @10s intervals: 71 72 74 74 74 73 MB/s
Read 80.1
Write 80.2
Mixed 55.4
SusWrite 72.9
53% 72.1 MB/s
4K Read 0.6
4K Write 2.3
4K Mixed 0.9
168% 1.27 MB/s
413GB free
Firmware: 05.04C05
SusWrite @10s intervals: 73 72 72 74 74 73 MB/s
Read 75.2
Write 70.4
Mixed 52.1
SusWrite 72.9
50% 67.7 MB/s
4K Read 0.6
4K Write 2.1
4K Mixed 0.8
153% 1.17 MB/s
233GB free
Firmware: 05.04C05
SusWrite @10s intervals: 84 84 86 84 83 86 MB/s
Read 62.9
Write 58.7
Mixed 44.3
SusWrite 84.6
46% 62.6 MB/s
4K Read 0.5
4K Write 2.4
4K Mixed 0.7
143% 1.2 MB/s
346GB free
Firmware: 05.04C05
SusWrite @10s intervals: 69 69 67 69 68 67 MB/s
Read 75.3
Write 68.5
Mixed 53.2
SusWrite 68.2
49% 66.3 MB/s
4K Read 0.5
4K Write 2.3
4K Mixed 0.8
152% 1.2 MB/s
5,710 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 31,011,140 HDDs tested.

Typical WD6400AACS-00G8B1 640GB Builds (Compare 36 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 2%
Tree trunk
Desktop
Desktop 42%
Speed boat
Workstation
Workstation 2%
Tree trunk

System: Medionpc MS-7501

EDIT WITH CUSTOM PC BUILDER Value: 52% - Above average Total price: $153

Popular WD6400AACS-00G8B1 640GB systems:

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.

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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.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
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  • - Share your opinion by voting.
Hard Drive Rankings (Price vs Performance) September 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]

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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

1014 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.
CPUGPUSSD
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Intel Core i5-9400F $140Nvidia GTX 1650S (Super) $170Samsung 850 Evo 120GB $78
Intel Core i7-9700K $290Nvidia RTX 2070S (Super) $505Samsung 860 Evo 250GB $42
HDDRAMUSB
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3200 C16 2x8GB $69SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair Vengeance LPX DDR4 3000 C15 2x8GB $65SanDisk Extreme 32GB $30
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Extreme 16GB $28
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