Real World Speed
Performance profile from 59,121 user samples
2,794 User Benchmarks
Best Bench: 82% 2TB free
Worst Bench: 43% 74GB free
Poor: 43% Great: 82%
SPEED RANK: 149th / 984
56,327 User Benchmarks
Best Bench: 105% 894GB free
Worst Bench: 61% 185GB free
Poor: 61% Great: 105%
SPEED RANK: 40th / 984
Effective Speed
Effective HDD Speed
64.9 % 87.2 % Much faster effective speed.
Avg. Sequential Read Speed
111 MB/s 157 MB/s Much faster read speed.
Avg. Sequential Write Speed
115 MB/s 147 MB/s Faster write speed.
4K Read
Avg. 4K Random Read Speed
0.52 MB/s 0.92 MB/s Much faster random read.
4K Write
Avg. 4K Random Write Speed
1.9 MB/s 2.23 MB/s Faster random write.
Avg. Sequential Mixed IO Speed
105 MB/s 137 MB/s Much faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
0.21 MB/s 0.29 MB/s Much faster random mixed IO.
Peak Sequential Read Speed
142 MB/s 198 MB/s Much faster peak read speed.
Peak Sequential Write Speed
146 MB/s 180 MB/s Faster peak write speed.
4K Read
Peak 4K Random Read Speed
0.78 MB/s 1.33 MB/s Much faster peak random read.
4K Write
Peak 4K Random Write Speed
2.47 MB/s 2.77 MB/s Slightly faster peak random write.
Peak Sequential Mixed IO Speed
134 MB/s 166 MB/s Faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
0.27 MB/s 0.37 MB/s Much faster peak random mixed IO.
Market Share
Based on 8,254,355 HDDs tested.
Market Share
Market Share (trailing 30 days)
0.08 % 1 % Insanely higher market share.
Value For Money
62 % Much better value.
35.8 %
User Rating
UBM User Rating
55 % 71 % More popular.
Price (score)
$60 Slightly cheaper.
44 Months More recent.
53 Months

The WD Purple is a surveillance drive with low power consumption and a design that's optimized for 24x7 operation. There is actually little beyond marketing that separates the Purple from the Red and Green drives. They all share almost identical hardware. The thing that does differentiate the Purple drives is their firmware which supports AllFrame, a surveillance specific feature. Allframe handles the cache in a way that is optimized for video streams. The AllFrame technology however is only enabled when used in conjunction with a supported host controller, most of which are only found in dedicated NVR (Network Video Recording) devices. As a result there is no benefit in using this drive in a HTPC to record video streams, because the surveillance specific functions won't be enabled. In terms of effective speed the Purple lags the new Red and Green drives by around 26%. [Oct '14 HDrivePro]


This is the most recent version (2013 FZEX) of Western Digital's best performing consumer storage drive, its predecessor was the WD1002FAEX which is now four years old. With average sequential read/write speeds of 150 MB/s this version outperforms its predecessor by a whopping 50%. Small file random 4K speeds have remained broadly unchanged with average read/write rates of 0.9/2.19 MB/s. Overall the 2013 WD Black has a very good performance profile and it also represents reasonable value for money, at least in the 1TB category. There are some good alternatives to the 2013 Black including the 2012 Blue. Looking at the 2013 Black vs 2012 Blue shows that both drives have similar performance. Power consumption (6.8/6.1 Watts active/idle) and noise levels (29.5 dBA) are also identical making it a tough call between the two. There is however, as always, better value amongst the larger capacities. [Feb '14 HDrivePro]


Hard Drive Rankings (Price vs Performance) March 2018 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]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Fastest effective speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
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.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

 Frequently Asked Questions

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Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $85
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $148
Intel Core i5-8600K $235AMD RX 480 $400Samsung 850 Pro 256GB $160
Seagate Barracuda 1TB (2016) $42Corsair Vengeance LPX DDR4 3000 C15 2x8GB $170SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $205SanDisk Extreme 16GB $18
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