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WD WD6401AALS

Black 640GB (2008)

▲ 500 ▼

Release date ≤ Q4 2013.

Average Bench: 51.2% (296th of 1015)

more Based on 12,658 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: 35%Average: 51.2% Great: 64%

Popular builds with this HDD

Average average bench

The WD Black 640GB (2008) averaged 48.7% 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 0.91MB/s
Avg. 4K Random Write Speed 2.12MB/s

Good consistency

The range of scores (95th - 5th percentile) for the WD Black 640GB (2008) is 28.5%. 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 65.6MB/s
Avg. Sustained Write Speed 85.4MB/s
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Average Bench

(Based on 12,658 samples)
Rank 29651.2%
Min Avg Max
60.8 Read 92.8 117
55.5 Write 87.9 110
45.1 Mixed 65.6 82.3
49.6 SusWrite 85.4 110
61.2% 82.9 MB/s
Min Avg Max
0.6 4K Read 0.77 0.9
1.5 4K Write 2.12 2.6
0.7 4K Mixed 0.91 1.1
173% 1.27 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
593GB free
Firmware: 01.03B01
SusWrite @10s intervals: 106 106 106 107 107 107 MB/s
63.3% Good
Read 114
Write 109
Mixed 72.5
SusWrite 106
74% 100 MB/s
4K Read 0.8
4K Write 2.3
4K Mixed 1
187% 1.37 MB/s
453GB free
Firmware: 01.03B01
SusWrite @10s intervals: 107 105 108 109 108 109 MB/s
59.5% Above average
Read 99.3
Write 93
Mixed 73.5
SusWrite 108
69% 93.4 MB/s
4K Read 0.7
4K Write 2.1
4K Mixed 1
179% 1.27 MB/s
575GB free (System drive)
Firmware: 05.01D05
SusWrite @10s intervals: 76 86 97 100 104 105 MB/s
57.6% Above average
Read 106
Write 102
Mixed 83.8
SusWrite 94.8
71% 96.5 MB/s
4K Read 1.2
4K Write 2.1
4K Mixed 1
200% 1.43 MB/s
558GB free
Firmware: 01.03B01
SusWrite @10s intervals: 94 97 102 101 98 102 MB/s
56.3% Above average
Read 96.7
Write 94.8
Mixed 62.2
SusWrite 99.2
65% 88.2 MB/s
4K Read 0.8
4K Write 2.4
4K Mixed 0.9
178% 1.37 MB/s
442GB free
Firmware: 01.03B01
SusWrite @10s intervals: 90 89 92 92 91 90 MB/s
55.4% Above average
Read 102
Write 98.7
Mixed 77
SusWrite 90.6
68% 92.1 MB/s
4K Read 0.9
4K Write 2.1
4K Mixed 0.9
176% 1.3 MB/s
180GB free
Firmware: 01.03B01
SusWrite @10s intervals: 84 85 83 82 83 85 MB/s
52.3% Above average
Read 98.2
Write 97.2
Mixed 73.5
SusWrite 83.8
65% 88.2 MB/s
4K Read 0.8
4K Write 2.1
4K Mixed 1
183% 1.3 MB/s
12GB free
Firmware: 05.01D05
SusWrite @10s intervals: 77 82 76 62 20 43 MB/s
44.7% Average
Read 95.3
Write 86
Mixed 77.8
SusWrite 59.9
59% 79.8 MB/s
4K Read 0.9
4K Write 1.9
4K Mixed 1
184% 1.27 MB/s
12,658 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 23,217,576 HDDs tested.

 Prices

AmazonUS $873 mins
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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 17,260 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 50%
Yacht
Desktop
Desktop 66%
Battle cruiser
Workstation
Workstation 35%
Sail boat

Motherboard: Asrock Z77 Extreme4 - $183

CPU
Core i5-3570KIntel  $195Bench 69%, 118,588 samples7,891x
Core i7-3770KIntel  $400Bench 68%, 94,099 samples3,328x
Core i7-3770Intel  $190Bench 64%, 146,655 samples1,474x
GPU
GTX 970Nvidia  $428Bench 51%, 512,894 samples1,756x
GTX 1070Nvidia  $346Bench 78%, 703,911 samples1,424x
GTX 1060-6GBNvidia  $277Bench 57%, 750,397 samples1,284x
SSD
850 Evo 250GBSamsung  $85Bench 106%, 532,443 samples1,124x
850 Evo 500GBSamsung  $107Bench 111%, 438,928 samples1,031x
860 Evo 500GBSamsung  $75Bench 108%, 258,156 samples444x
RAM
Vengeance DDR3 1600 C9 2x4GBCorsairBench 48%, 45,482 samples715x
Vengeance DDR3 1600 C9 4x4GBCorsairBench 53%, 22,961 samples401x
Vengeance DDR3 1600 C10 2x8GBCorsairBench 54%, 24,633 samples352x
EDIT WITH CUSTOM PC BUILDER Value: 40% - Below average Total price: $891

Popular Black 640GB (2008) compatible motherboards:

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  • - CPU tests include: integer, floating and string.
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Hard Drive Rankings (Price vs Performance) January 2020 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

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Speed Comparisons

vs Seagate Barracuda 1TB (2016)
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vs WD Black 1TB (2013)
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vs WD Black 2TB (2013)
vs Seagate Barracuda 7200.14 3TB

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
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What is 3D XPoint and how fast is it?
What’s the difference between SATA, PCIe and NVMe?
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What is 4K random write speed?
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 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-9600K $229Nvidia GTX 1660S (Super) $240Crucial MX500 250GB $46
Intel Core i5-9400F $155Nvidia GTX 1650S (Super) $160Samsung 850 Evo 120GB $78
Intel Core i7-9700K $370Nvidia RTX 2060 $339Samsung 850 Pro 512GB $204
HDDRAMUSB
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $80SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $63SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $643SanDisk Ultra Fit 32GB $16
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