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WD WD6401AALS

Black 640GB (2008)

▲ 501 ▼

Release date ≤ Q4 2013.

Average Bench: 51.4% (291st of 1015)

more Based on 15,042 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: 51.4% Great: 64%

Popular builds with this HDD

Average average bench

The WD Black 640GB (2008) averaged 48.5% 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 2.11MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the WD Black 640GB (2008) is 30.9%. 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 66MB/s
Avg. Sustained Write Speed 85.5MB/s
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Average Bench

(Based on 15,042 samples)
Rank 29151.4%
Min Avg Max
58.9 Read 93.4 118
55.9 Write 87.7 110
46 Mixed 66 82
54.2 SusWrite 85.5 110
61.3% 83.1 MB/s
Min Avg Max
0.6 4K Read 0.78 0.9
1.4 4K Write 2.11 2.6
0.7 4K Mixed 0.91 1.06
173% 1.27 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
375GB free
Firmware: 05.01D05
SusWrite @10s intervals: 95 96 95 96 95 94 MB/s
66.3% Good
Read 136
Write 110
Mixed 101
SusWrite 95.1
82% 110 MB/s
4K Read 0.9
4K Write 2.6
4K Mixed 0.9
186% 1.47 MB/s
596GB free
Firmware: 01.03B01
SusWrite @10s intervals: 108 110 111 110 111 111 MB/s
61.8% Good
Read 105
Write 102
Mixed 65.9
SusWrite 110
70% 95.8 MB/s
4K Read 0.8
4K Write 2.2
4K Mixed 1
185% 1.33 MB/s
434GB free
Firmware: 01.03B01
SusWrite @10s intervals: 101 102 102 103 103 103 MB/s
59.8% Above average
Read 106
Write 105
Mixed 83
SusWrite 102
73% 99 MB/s
4K Read 0.7
4K Write 2.4
4K Mixed 0.9
174% 1.33 MB/s
416GB free
Firmware: 05.01D05
SusWrite @10s intervals: 71 68 73 76 77 71 MB/s
56.8% Above average
Read 125
Write 76.6
Mixed 73.8
SusWrite 72.5
64% 87 MB/s
4K Read 1.4
4K Write 1.3
4K Mixed 0.6
149% 1.1 MB/s
245GB free
Firmware: 01.03B01
SusWrite @10s intervals: 88 88 88 87 89 89 MB/s
50.6% Above average
Read 88.1
Write 87.6
Mixed 68.4
SusWrite 88.1
61% 83.1 MB/s
4K Read 0.5
4K Write 2
4K Mixed 0.6
124% 1.03 MB/s
164GB free
Firmware: 100.
SusWrite @10s intervals: 87 81 50 60 56 54 MB/s
50.1% Above average
Read 109
Write 102
Mixed 60.2
SusWrite 64.7
62% 84.2 MB/s
4K Read 0.8
4K Write 2.2
4K Mixed 1
185% 1.33 MB/s
15,042 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 34,993,745 HDDs tested.

 Prices

AmazonUS $665 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 44,948 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 106%
UFO
Desktop
Desktop 94%
Nuclear submarine
Workstation
Workstation 107%
UFO

Motherboard: Asus TUF GAMING X570-PLUS (WI-FI) - $189

CPU
Ryzen 7 3700XAMD  $329Bench 87%, 450,504 samples14,761x
Ryzen 5 3600AMD  $198Bench 84%, 703,010 samples7,793x
Ryzen 9 3900XAMD  $544Bench 89%, 188,169 samples6,839x
GPU
RTX 2070S (Super)Nvidia  $510Bench 118%, 401,550 samples7,181x
RX 5700-XTAMD  $400Bench 107%, 286,928 samples6,126x
RTX 2080S (Super)Nvidia  $770Bench 137%, 148,615 samples2,790x
SSD
970 Evo Plus NVMe PCIe M.2 1TBSamsung  $150Bench 323%, 187,309 samples2,454x
970 Evo Plus NVMe PCIe M.2 500GBSamsung  $85Bench 287%, 246,585 samples2,434x
970 Evo NVMe PCIe M.2 1TBSamsung  $130Bench 307%, 197,148 samples2,350x
RAM
Vengeance LPX DDR4 3200 C16 2x8GBCorsair  $79Bench 85%, 360,684 samples2,124x
Vengeance RGB PRO DDR4 3200 C16 2x16GBCorsair  $214Bench 87%, 79,497 samples1,959x
Vengeance RGB PRO DDR4 3200 C16 2x8GBCorsair  $95Bench 85%, 188,132 samples1,890x
EDIT WITH CUSTOM PC BUILDER Value: 70% - Very good Total price: $1,257

Popular Black 640GB (2008) compatible motherboards:

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  • - CPU tests include: integer, floating and string.
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  • - Drive tests include: read, write, sustained write and mixed IO.
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Hard Drive Rankings (Price vs Performance) January 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.

 Comments

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Speed Comparisons

vs Seagate Barracuda 1TB (2016)
vs WD Blue 1TB (2012)
vs Seagate Barracuda 3TB (2016)
vs Seagate Barracuda 2TB (2016)
vs WD Black 1TB (2013)
vs Seagate Barracuda 7200.14 1TB
vs Seagate Barracuda 4TB (2016)
vs WD Black 2TB (2013)
vs WD Black 6TB (2015)

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
What is the Hard Drive value for money rating?
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ALL FAQs »

 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-9600K $208Nvidia RTX 3060-Ti $400Crucial MX500 250GB $47
Intel Core i5-10600K $257Nvidia RTX 3070 $500Samsung 850 Evo 120GB $78
Intel Core i5-10400F $161Nvidia GTX 1660S (Super) $240Samsung 860 Evo 250GB $40
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $32Corsair Vengeance LPX DDR4 3000 C15 2x8GB $71SanDisk Extreme 32GB $28
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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