Average Bench: 49.2% (318th of 1015)

more Based on 12,201 user benchmarks.  Models: WDC WD6401AALS-00L3B2, WDC WD6401AALS-00L3B, WDC WD64 01AALS-00J7B, WDC WD64 01AALS-00E3A, WDC WD64 01AALS-00E8B0, WDC WD6401AALS-00E3A, WDC WD64 01AALS-00E3A0, WDC WD6401AALS-00E8B0, WDC WD6401AALS-00J7B, WDC WD64 01AALS-00E8B, WDC WD64 01AALS-00L3B2, WDC WD6401AALS-00E3A0, WDC WD6401AALS-00J7B1, WDC WD6401AALS-00E8B, WDC WD6401AALS-00J7B0, WDC WD64 01AALS-00J7B0, WDC WD6401AALS-0, WDC WD64 01AALS-00J7B1, WDC WD64 01AALS-00L3B

Below average average bench

The WD Black 640GB (2008) averaged 50.7% 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 0.9MB/s
Avg. 4K Random Write Speed 2.06MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the WD Black 640GB (2008) is 34.4%. This is a relatively narrow range which indicates that the WD Black 640GB (2008) performs reasonably consistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 64.2MB/s
Avg. Sustained Write Speed 81.6MB/s
ADVERTISEMENT

Average Bench

(Based on 12,201 samples)
Min Avg Max
56 Read 89.6 114
51 Write 85.3 109
39.5 Mixed 64.2 80.3
38 SusWrite 81.6 109
59.2% 80.2 MB/s
Min Avg Max
0.4 4K Read 0.76 0.9
1.1 4K Write 2.06 2.7
0.5 4K Mixed 0.9 1.1
170% 1.24 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
930GB free
Firmware: 05.01D05
SusWrite @10s intervals: 191 192 194 200 198 195 MB/s
Read 205
Write 186
Mixed 98
SusWrite 195
125% 171 MB/s
4K Read 1.8
4K Write 3.9
4K Mixed 1.5
314% 2.4 MB/s
110GB free
Firmware: 05.01D05
SusWrite @10s intervals: 107 107 107 109 109 110 MB/s
Read 122
Write 103
Mixed 85
SusWrite 108
77% 104 MB/s
4K Read 1
4K Write 2.2
4K Mixed 0.9
182% 1.37 MB/s
596GB free
Firmware: 01.03B01
SusWrite @10s intervals: 108 108 110 110 110 111 MB/s
Read 112
Write 96.7
Mixed 77
SusWrite 110
73% 98.8 MB/s
4K Read 0.7
4K Write 2.1
4K Mixed 0.8
157% 1.2 MB/s
471GB free
Firmware: 01.03B01
SusWrite @10s intervals: 107 108 107 108 106 108 MB/s
Read 114
Write 102
Mixed 78.3
SusWrite 107
74% 100 MB/s
4K Read 0.6
4K Write 2
4K Mixed 0.9
162% 1.17 MB/s
106GB free
Firmware: 01.03B01
SusWrite @10s intervals: 105 106 108 109 108 108 MB/s
Read 106
Write 103
Mixed 76.6
SusWrite 107
72% 98.3 MB/s
4K Read 0.7
4K Write 1.9
4K Mixed 1.1
187% 1.23 MB/s
335GB free
Firmware: 01.03B01
SusWrite @10s intervals: 86 87 87 92 92 93 MB/s
Read 103
Write 100
Mixed 76.9
SusWrite 89.5
68% 92.5 MB/s
4K Read 0.9
4K Write 2
4K Mixed 1
186% 1.3 MB/s
278GB free
Firmware: 01.03B01
SusWrite @10s intervals: 88 90 92 95 96 95 MB/s
Read 96.7
Write 93.5
Mixed 66.4
SusWrite 92.7
64% 87.3 MB/s
4K Read 0.9
4K Write 1.9
4K Mixed 0.9
173% 1.23 MB/s
91GB free
Firmware: 01.03B01
SusWrite @10s intervals: 72 86 88 93 92 93 MB/s
Read 101
Write 88.7
Mixed 71
SusWrite 87.3
64% 87 MB/s
4K Read 0.9
4K Write 1.9
4K Mixed 0.9
173% 1.23 MB/s
12,201 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 21,764,346 HDDs tested.

 Prices

AmazonUS $8014 months
Send price feedback
Typical Black 640GB (2008) Builds (Compare 16,306 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 50%
Yacht
Desktop
Desktop 65%
Destroyer
Workstation
Workstation 34%
Sail boat

Motherboard: Asrock Z77 Extreme4 - $167

EDIT WITH CUSTOM PC BUILDER Value: 44% - Average Total price: $921

Popular Black 640GB (2008) compatible motherboards:

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) December 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 i5-9400F $145Nvidia GTX 1660S (Super) $240Crucial MX500 250GB $44
Intel Core i5-9600K $200Nvidia RTX 2060 $324Samsung 850 Evo 120GB $150
Intel Core i7-9700K $360AMD RX 590 $180Samsung 850 Pro 512GB $230
HDDRAMUSB
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $80SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $58SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $613SanDisk Extreme 16GB $24
Today's hottest deals
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer Feedback