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WD WD6401AALS

Black 640GB (2008)

▲ 500 ▼

Release date ≤ Q4 2013.

VS

Average Bench: 50.1% (311th of 1015)

more Based on 11,011 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: 30%Average: 50.1% Great: 64%

Popular builds with this HDD

Average average bench

The WD Black 640GB (2008) averaged 49.9% 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 34.1%. 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 82.9MB/s
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Average Bench

(Based on 11,011 samples)
Rank 31150.1%
Min Avg Max
55.4 Read 91.2 116
55.3 Write 87.1 110
41.2 Mixed 65.4 81.5
44.8 SusWrite 82.9 110
60.2% 81.7 MB/s
Min Avg Max
0.5 4K Read 0.77 0.9
1.25 4K Write 2.11 2.7
0.6 4K Mixed 0.91 1.1
172% 1.26 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
517GB free
Firmware: 01.03B01
SusWrite @10s intervals: 107 105 108 107 108 104 MB/s
62.8% Good
Read 112
Write 106
Mixed 78.5
SusWrite 106
74% 101 MB/s
4K Read 0.8
4K Write 2.3
4K Mixed 1
187% 1.37 MB/s
596GB free
Firmware: 01.03B01
SusWrite @10s intervals: 107 106 108 109 110 108 MB/s
61.7% Good
Read 107
Write 109
Mixed 66.7
SusWrite 108
72% 97.7 MB/s
4K Read 0.7
4K Write 1.9
4K Mixed 1
176% 1.2 MB/s
324GB free
Firmware: 01.03B01
SusWrite @10s intervals: 95 105 101 101 105 101 MB/s
50.8% Above average
Read 75.5
Write 69.8
Mixed 57.3
SusWrite 101
56% 76 MB/s
4K Read 0.8
4K Write 1.9
4K Mixed 0.9
168% 1.2 MB/s
355GB free
Firmware: 05.00K05
SusWrite @10s intervals: 36 37 37 37 37 37 MB/s
43.8% Average
Read 116
Write 38
Mixed 43.2
SusWrite 36.9
43% 58.5 MB/s
4K Read 0.9
4K Write 0.6
4K Mixed 0.6
115% 0.7 MB/s
241GB free
Firmware: 01.03B01
SusWrite @10s intervals: 35 36 36 36 36 33 MB/s
37.6% Below average
Read 95.5
Write 33.8
Mixed 37.8
SusWrite 35.6
37% 50.7 MB/s
4K Read 0.8
4K Write 0.5
4K Mixed 0.6
109% 0.63 MB/s
11,011 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 19,303,853 HDDs tested.

 Prices

AmazonUS $8010 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 14,817 builds) See popular component choices, score breakdowns and rankings.
Gaming
Gaming 47%
Yacht
Desktop
Desktop 66%
Battle cruiser
Workstation
Workstation 35%
Sail boat

Motherboard: Asrock Z77 Extreme4 - $167

CPU
Core i5-3570KIntel  $195Bench 61%, 101,898 samples6,823x
Core i7-3770KIntel  $300Bench 64%, 85,445 samples2,806x
Core i7-3770Intel  $266Bench 61%, 123,629 samples1,251x
GPU
GTX 970Nvidia  $399Bench 50%, 450,510 samples1,543x
GTX 1070Nvidia  $400Bench 78%, 627,271 samples1,254x
GTX 1060-6GBNvidia  $270Bench 56%, 658,194 samples1,111x
SSD
850 Evo 250GBSamsung  $86Bench 106%, 458,148 samples1,017x
850 Evo 500GBSamsung  $102Bench 112%, 348,759 samples928x
840 Evo 250GBSamsung  $100Bench 96%, 105,752 samples345x
RAM
Vengeance DDR3 1600 C9 2x4GBCorsairBench 50%, 47,129 samples633x
Vengeance DDR3 1600 C9 4x4GBCorsairBench 54%, 18,129 samples341x
Vengeance LP DDR3 1600 C9 2x4GBCorsairBench 50%, 20,238 samples304x
EDIT WITH CUSTOM PC BUILDER Value: 39% - Below average Total price: $847

Popular Black 640GB (2008) compatible motherboards:

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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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  • - 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) August 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]

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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

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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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 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-9600K $219Nvidia GTX 1660 $220Samsung 850 Evo 250GB $86
Intel Core i5-9400F $143Nvidia GTX 1660-Ti $270Samsung 850 Evo 500GB $102
AMD Ryzen 5 3600 $196AMD RX 580 $167Samsung 850 Pro 256GB $97
HDDRAMUSB
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $75SanDisk Extreme 64GB $88
WD Blue 1TB (2012) $42G.SKILL Trident Z DDR4 3200 C14 4x16GB $799SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $75Corsair Vengeance LPX DDR4 3200 C16 2x8GB $80SanDisk Extreme 16GB $24
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