Average Bench: 39% (530th of 1015)

more Based on 4,021 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 60.9% 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 0.75MB/s
Avg. 4K Random Write Speed 2.12MB/s

Good consistency

The range of scores (95th - 5th percentile) for the WD WD6400AACS-00G8B1 640GB is 24.3%. 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 48.4MB/s
Avg. Sustained Write Speed 65.5MB/s
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Average Bench

(Based on 4,021 samples)
Min Avg Max
42.4 Read 70.1 90.4
39.7 Write 68 87.2
30.1 Mixed 48.4 58.5
38.1 SusWrite 65.5 85.3
46.4% 63 MB/s
Min Avg Max
0.4 4K Read 0.55 0.7
1.2 4K Write 2.12 2.6
0.5 4K Mixed 0.75 0.9
145% 1.14 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
350GB free (System drive)
Firmware: 05.04C05
SusWrite @10s intervals: 70 61 76 75 81 82 MB/s
Read 87.2
Write 16.9
Mixed 34.2
SusWrite 74.1
39% 53.1 MB/s
4K Read 0.4
4K Write 0.7
4K Mixed 0.5
85% 0.53 MB/s
442GB free
Firmware: 05.04C05
SusWrite @10s intervals: 78 79 77 80 79 79 MB/s
Read 75.5
Write 81
Mixed 57.7
SusWrite 78.7
54% 73.2 MB/s
4K Read 0.6
4K Write 2.7
4K Mixed 0.8
164% 1.37 MB/s
126GB free
Firmware: 05.04C05
SusWrite @10s intervals: 55 58 58 62 59 74 MB/s
Read 80.5
Write 82.2
Mixed 58
SusWrite 60.9
52% 70.4 MB/s
4K Read 0.6
4K Write 2.6
4K Mixed 0.8
162% 1.33 MB/s
160GB free
Firmware: 05.04C05
SusWrite @10s intervals: 70 71 71 73 72 74 MB/s
Read 67.8
Write 68.3
Mixed 51
SusWrite 71.7
48% 64.7 MB/s
4K Read 0.7
4K Write 2.3
4K Mixed 0.9
172% 1.3 MB/s
388GB free
Firmware: 01.01A01
SusWrite @10s intervals: 68 68 70 70 69 66 MB/s
Read 64.2
Write 65
Mixed 50.8
SusWrite 68.4
46% 62.1 MB/s
4K Read 0.5
4K Write 2
4K Mixed 0.7
136% 1.07 MB/s
126GB free
Firmware: 05.04C05
SusWrite @10s intervals: 55 56 56 58 61 60 MB/s
Read 60.7
Write 58
Mixed 43.7
SusWrite 57.6
41% 55 MB/s
4K Read 0.5
4K Write 2.2
4K Mixed 0.6
128% 1.1 MB/s
567GB free (System drive)
Firmware: 05.04C05
SusWrite @10s intervals: 49 54 37 42 46 52 MB/s
Read 60.1
Write 59.5
Mixed 47.7
SusWrite 46.5
40% 53.5 MB/s
4K Read 0.6
4K Write 1.9
4K Mixed 0.7
138% 1.07 MB/s
4,021 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 21,113,769 HDDs tested.

Typical WD6400AACS-00G8B1 640GB Builds (Compare 126 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 11%
Tree trunk
Desktop
Desktop 30%
Raft
Workstation
Workstation 15%
Tree trunk

System: Medionpc MS-7501

EDIT WITH CUSTOM PC BUILDER Value: 20% - Very poor Total price: $325

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) November 2019 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

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.
CPUGPUSSD
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Intel Core i5-9600K $205Nvidia GTX 1660 $210Samsung 850 Evo 120GB $150
Intel Core i7-9700K $340Nvidia GTX 1660-Ti $260Samsung 860 Evo 250GB $49
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $65SanDisk Extreme 64GB $88
WD Blue 1TB (2012) $40G.SKILL Trident Z DDR4 3200 C14 4x16GB $612SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $75Corsair Vengeance LPX DDR4 3200 C16 2x8GB $80SanDisk Ultra Fit 32GB $14
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