Average Bench: 38.7% (535th of 1015)

more Based on 4,382 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 61.3% 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 0.74MB/s
Avg. 4K Random Write Speed 2.06MB/s

Good consistency

The range of scores (95th - 5th percentile) for the WD WD6400AACS-00G8B1 640GB is 25.7%. 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 47.7MB/s
Avg. Sustained Write Speed 65.1MB/s
ADVERTISEMENT

Average Bench

(Based on 4,382 samples)
Min Avg Max
40.7 Read 69.2 88.3
34.4 Write 66.8 85.9
27.5 Mixed 47.7 58.5
37.2 SusWrite 65.1 85
45.8% 62.2 MB/s
Min Avg Max
0.3 4K Read 0.54 0.7
0.9 4K Write 2.06 2.6
0.4 4K Mixed 0.74 0.9
142% 1.11 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
308GB free
Firmware: 05.04E05
SusWrite @10s intervals: 76 75 75 76 72 75 MB/s
Read 89.5
Write 88.3
Mixed 57.3
SusWrite 74.9
57% 77.5 MB/s
4K Read 0.6
4K Write 2.6
4K Mixed 0.8
162% 1.33 MB/s
579GB free
Firmware: 05.04C05
SusWrite @10s intervals: 80 82 80 82 82 82 MB/s
Read 83
Write 85
Mixed 56.3
SusWrite 81.4
56% 76.4 MB/s
4K Read 0.5
4K Write 2.3
4K Mixed 0.8
152% 1.2 MB/s
595GB free
Firmware: 05.04C05
SusWrite @10s intervals: 77 75 75 70 70 67 MB/s
Read 80.3
Write 78.5
Mixed 53.5
SusWrite 72.1
52% 71.1 MB/s
4K Read 0.5
4K Write 2
4K Mixed 0.7
136% 1.07 MB/s
639GB free
Firmware: 05.04C05
SusWrite @10s intervals: 78 78 75 78 77 77 MB/s
Read 74.5
Write 76.8
Mixed 52.5
SusWrite 77
52% 70.2 MB/s
4K Read 0.5
4K Write 1.9
4K Mixed 0.8
145% 1.07 MB/s
133GB free
Firmware: 05.04C05
SusWrite @10s intervals: 69 68 69 67 70 70 MB/s
Read 62.3
Write 65.2
Mixed 48
SusWrite 68.7
45% 61 MB/s
4K Read 0.5
4K Write 2.1
4K Mixed 0.7
138% 1.1 MB/s
370GB free
Firmware: 05.04C05
SusWrite @10s intervals: 54 55 54 55 55 55 MB/s
Read 75.2
Write 62.5
Mixed 50.3
SusWrite 54.8
45% 60.7 MB/s
4K Read 0.7
4K Write 2.3
4K Mixed 0.8
161% 1.27 MB/s
39GB free
Firmware: 05.04C05
SusWrite @10s intervals: 56 55 55 54 55 54 MB/s
Read 46.2
Write 43.8
Mixed 36
SusWrite 54.7
33% 45.2 MB/s
4K Read 0.6
4K Write 1.4
4K Mixed 0.9
151% 0.97 MB/s
4,382 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 18,456,471 HDDs tested.

Typical WD6400AACS-00G8B1 640GB Builds (Compare 113 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 12%
Tree trunk
Desktop
Desktop 30%
Sail boat
Workstation
Workstation 15%
Surfboard

System: Medionpc MS-7501

EDIT WITH CUSTOM PC BUILDER Value: 68% - Good 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.

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.
  • - 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.
  • - Share your opinion by voting.
Hard Drive Rankings (Price vs Performance) July 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]

ADVERTISEMENT

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
Intel Core i7-8700K $350Nvidia GTX 1070 $400Samsung 850 Evo 250GB $104
AMD Ryzen 5 2600 $127Nvidia GTX 1060-6GB $250Samsung 850 Evo 500GB $103
AMD Ryzen 7 2700X $248Nvidia GTX 1080-Ti $750Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $70SanDisk Extreme 64GB $128
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $728SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $78SanDisk Ultra Fit 32GB $12
Today's hottest deals
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback