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WD WD6401AALS

Black 640GB (2008)

▲ 504 ▼

Release date ≤ Q4 2013.

Average Bench: 49.6% (310th of 1015)

more Based on 19,988 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: 32%Average: 49.6% Great: 65%

Popular builds with this HDD

Below average average bench

The WD Black 640GB (2008) averaged 50.4% 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 0.89MB/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 32.5%. 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 65.9MB/s
Avg. Sustained Write Speed 83.1MB/s
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Average Bench

(Based on 19,988 samples)
Rank 31049.6%
Min Avg Max
54.8 Read 89.3 116
52 Write 85.9 113
40.1 Mixed 65.9 83
42.2 SusWrite 83.1 111
59.8% 81 MB/s
Min Avg Max
0.52 4K Read 0.78 0.9
0.92 4K Write 2.06 2.6
0.62 4K Mixed 0.89 1
169% 1.24 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
12GB free
Firmware: 05.01D05
SusWrite @10s intervals: 90 103 96 101 98 98 MB/s
62.4% Good
Read 119
Write 104
Mixed 97
SusWrite 97.7
78% 105 MB/s
4K Read 1.2
4K Write 2.3
4K Mixed 0.9
193% 1.47 MB/s
595GB free
Firmware: 01.03B01
SusWrite @10s intervals: 92 101 100 101 98 98 MB/s
58.3% Above average
Read 105
Write 95.6
Mixed 76.4
SusWrite 98.3
69% 93.8 MB/s
4K Read 0.7
4K Write 1.7
4K Mixed 0.8
150% 1.07 MB/s
58GB free
Firmware: 01.03B01
SusWrite @10s intervals: 87 85 86 87 88 87 MB/s
52.8% Above average
Read 96.9
Write 89.6
Mixed 60.5
SusWrite 86.6
61% 83.4 MB/s
4K Read 0.8
4K Write 2.1
4K Mixed 0.9
172% 1.27 MB/s
357GB free
Firmware: 01.03B01
SusWrite @10s intervals: 76 74 76 78 77 76 MB/s
51.2% Above average
Read 102
Write 89.3
Mixed 72.2
SusWrite 76.2
63% 84.9 MB/s
4K Read 0.7
4K Write 2
4K Mixed 0.8
155% 1.17 MB/s
381GB free
Firmware: 05.00K05
SusWrite @10s intervals: 80 84 83 84 84 83 MB/s
49.7% Average
Read 89.5
Write 76.9
Mixed 67.9
SusWrite 83
59% 79.3 MB/s
4K Read 0.7
4K Write 2.7
4K Mixed 1.1
201% 1.5 MB/s
166GB free
Firmware: 01.03B01
SusWrite @10s intervals: 74 67 72 74 74 74 MB/s
41% Average
Read 70
Write 72.2
Mixed 61.8
SusWrite 72.4
51% 69.1 MB/s
4K Read 0.7
4K Write 2
4K Mixed 0.9
166% 1.2 MB/s
200GB free (System drive)
Firmware: 05.00K05
SusWrite @10s intervals: 47 58 64 64 66 68 MB/s
39.1% Below average
Read 74.7
Write 74.5
Mixed 60.3
SusWrite 61
50% 67.6 MB/s
4K Read 0.6
4K Write 2.3
4K Mixed 0.7
145% 1.2 MB/s
19,988 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 53,307,973 HDDs tested

 Prices

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AmazonUS $2524 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 25,766 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 129%
UFO
Desktop
Desktop 94%
Nuclear submarine
Workstation
Workstation 130%
UFO

Motherboard: Asus TUF GAMING X570-PLUS (WI-FI) - $193

CPU
Ryzen 7 3700XAMD  $205Bench 86%, 635,419 samples4,634x
Ryzen 7 5800XAMD  $201Bench 98%, 128,080 samples4,258x
Ryzen 5 5600XAMD  $150Bench 96%, 383,420 samples3,408x
GPU
RTX 3070Nvidia  $400Bench 148%, 619,642 samples2,232x
RTX 3080Nvidia  $910Bench 187%, 424,051 samples2,071x
RTX 2070S (Super)Nvidia  $210Bench 115%, 663,603 samples1,465x
SSD
970 Evo Plus NVMe PCIe M.2 1TBSamsung  $95Bench 310%, 455,997 samples1,834x
980 Pro NVMe PCIe M.2 1TBSamsung  $98Bench 394%, 276,089 samples1,104x
970 Evo NVMe PCIe M.2 1TBSamsung  $158Bench 297%, 331,647 samples863x
RAM
Vengeance LPX DDR4 3200 C16 2x8GBCorsair  $40Bench 85%, 653,654 samples769x
Vengeance RGB PRO DDR4 3200 C16 2x8GBCorsair  $63Bench 85%, 346,786 samples724x
Vengeance RGB PRO DDR4 3200 C16 2x16GBCorsair  $114Bench 89%, 144,399 samples645x
EDIT WITH CUSTOM PC BUILDER Value: 98% - Outstanding Total price: $933

Popular Black 640GB (2008) compatible motherboards:

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Hard Drive Rankings (Price vs Performance) April 2024 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

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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
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What is 4K random write speed?
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ALL FAQs »

 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $279Nvidia RTX 4060 $300Crucial MX500 250GB $40
Intel Core i5-12400F $134Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $184Nvidia RTX 4070 $409Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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