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WD WD6401AALS

Black 640GB (2008)

▲ 501 ▼

Release date ≤ Q4 2013.

Average Bench: 50.8% (296th of 1015)

more Based on 18,520 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
Poor: 34%Average: 50.8% Great: 64%

Popular builds with this HDD

Average average bench

The WD Black 640GB (2008) averaged 49.2% 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 0.9MB/s
Avg. 4K Random Write Speed 2.11MB/s

Good consistency

The range of scores (95th - 5th percentile) for the WD Black 640GB (2008) is 29.3%. 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 65.4MB/s
Avg. Sustained Write Speed 84.7MB/s
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Average Bench

(Based on 18,520 samples)
Rank 29650.8%
Min Avg Max
57.2 Read 91.9 116
51.5 Write 86.4 109
42.6 Mixed 65.4 81.5
48.5 SusWrite 84.7 109
60.6% 82.1 MB/s
Min Avg Max
0.5 4K Read 0.77 0.9
1.4 4K Write 2.11 2.6
0.7 4K Mixed 0.9 1
171% 1.26 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
596GB free
Firmware: 01.0
SusWrite @10s intervals: 100 102 103 101 108 108 MB/s
62.4% Good
Read 114
Write 104
Mixed 70.3
SusWrite 104
72% 97.8 MB/s
4K Read 0.8
4K Write 2
4K Mixed 1.1
193% 1.3 MB/s
187GB free
Firmware: 01.03B01
SusWrite @10s intervals: 86 88 84 86 85 87 MB/s
49.3% Average
Read 85.5
Write 85.6
Mixed 60.3
SusWrite 86.1
58% 79.4 MB/s
4K Read 0.7
4K Write 1.8
4K Mixed 0.9
162% 1.13 MB/s
186GB free
Firmware: 01.03B01
SusWrite @10s intervals: 86 87 88 88 88 89 MB/s
48.8% Average
Read 82.5
Write 74.6
Mixed 59.3
SusWrite 87.4
56% 76 MB/s
4K Read 0.8
4K Write 1.7
4K Mixed 1
176% 1.17 MB/s
296GB free
Firmware: 05.00K05
SusWrite @10s intervals: 67 79 79 80 80 80 MB/s
46.9% Average
Read 85.6
Write 83.8
Mixed 62.1
SusWrite 77.3
57% 77.2 MB/s
4K Read 0.8
4K Write 2.3
4K Mixed 0.9
176% 1.33 MB/s
481GB free (System drive)
Firmware: 01.03B01
SusWrite @10s intervals: 73 27 13 43 74 89 MB/s
42.2% Average
Read 93.4
Write 85.5
Mixed 61.5
SusWrite 53.2
54% 73.4 MB/s
4K Read 0.8
4K Write 1.9
4K Mixed 1.1
191% 1.27 MB/s
18,520 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 40,750,488 HDDs tested.

 Prices

AmazonUS $6613 months
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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 Black 640GB (2008) Builds (Compare 73,288 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 104%
UFO
Desktop
Desktop 94%
Nuclear submarine
Workstation
Workstation 106%
UFO

Motherboard: Asus TUF GAMING X570-PLUS (WI-FI) - $169

CPU
Ryzen 7 3700XAMD  $309Bench 87%, 669,386 samples21,370x
Ryzen 5 3600AMD  $270Bench 84%, 980,212 samples11,134x
Ryzen 9 3900XAMD  $459Bench 87%, 242,633 samples9,644x
GPU
RTX 2070S (Super)Nvidia  $510Bench 117%, 505,105 samples9,183x
RX 5700-XTAMD  $400Bench 105%, 363,665 samples8,032x
RTX 3070Nvidia  $500Bench 152%, 281,761 samples4,857x
SSD
970 Evo Plus NVMe PCIe M.2 1TBSamsung  $144Bench 324%, 291,009 samples4,375x
970 Evo NVMe PCIe M.2 1TBSamsung  $155Bench 298%, 258,279 samples3,929x
970 Evo Plus NVMe PCIe M.2 500GBSamsung  $75Bench 279%, 338,360 samples3,510x
RAM
Vengeance LPX DDR4 3200 C16 2x8GBCorsair  $74Bench 85%, 517,339 samples3,156x
Vengeance RGB PRO DDR4 3200 C16 2x8GBCorsair  $90Bench 84%, 269,954 samples2,984x
Vengeance RGB PRO DDR4 3200 C16 2x16GBCorsair  $330Bench 87%, 120,905 samples2,844x
EDIT WITH CUSTOM PC BUILDER Value: 71% - Very good Total price: $1,207

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.

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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.
  • - 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.
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Hard Drive Rankings (Price vs Performance) September 2021 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.

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Speed Comparisons

vs Seagate Barracuda 1TB (2016)
vs WD Blue 1TB (2012)
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vs Seagate Barracuda 3TB (2016)
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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
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ALL FAQs »

 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-11600K $270Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11400F $260Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-11700K $380Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $183
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3200 C16 2x8GB $74SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $77SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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