Real World Speed
Performance profile from 6,803 user samples
307 User Benchmarks
Best Bench: 130% 5.5TB free
Worst Bench: 90% 4TB free
Poor: 90% Great: 130%
SPEED RANK: 1st / 979
6,496 User Benchmarks
Best Bench: 96% 3.5TB free
Worst Bench: 54% 137GB free
Poor: 54% Great: 96%
SPEED RANK: 81st / 979
Effective Speed
Effective HDD Speed
113 % Much faster effective speed.
77.4 % -46%
Avg. Sequential Read Speed
176 MB/s Faster read speed.
141 MB/s -25%
Avg. Sequential Write Speed
218 MB/s Much faster write speed.
129 MB/s -69%
4K Read
Avg. 4K Random Read Speed
4.36 MB/s Hugely faster random read.
0.58 MB/s -652%
4K Write
Avg. 4K Random Write Speed
2.78 MB/s Hugely faster random write.
1.37 MB/s -103%
Avg. Sequential Mixed IO Speed
169 MB/s Much faster mixed IO speed.
120 MB/s -41%
4K Mixed
Avg. 4K Random Mixed IO Speed
0.3 MB/s Much faster random mixed IO.
0.19 MB/s -58%
Peak Sequential Read Speed
216 MB/s Faster peak read speed.
177 MB/s -22%
Peak Sequential Write Speed
248 MB/s Much faster peak write speed.
165 MB/s -50%
4K Read
Peak 4K Random Read Speed
7.48 MB/s Hugely faster peak random read.
0.75 MB/s -897%
4K Write
Peak 4K Random Write Speed
3.28 MB/s Much faster peak random write.
1.99 MB/s -65%
Peak Sequential Mixed IO Speed
212 MB/s Much faster peak mixed IO speed.
152 MB/s -39%
4K Mixed
Peak 4K Random Mixed IO Speed
0.4 MB/s Much faster peak random mixed IO.
0.26 MB/s -54%
Market Share
Based on 3,768,423 HDDs tested.
Market Share
Market Share (trailing 30 days)
0 % -∞% 0.5 % Insanely higher market share.
Value For Money
66.7 % -15% 76.7 % Slightly better value.
User Rating
UBM User Rating
72 % Much more popular.
54 % -33%
Price (score)
$293 -60% $116 Much cheaper.
22 Months Much more recent.
50 Months -56%

This is Seagate's most recent hard drive and their first 4TB consumer offering. With a rotational speed of just 5,900 RPM it's significantly slower than the 7,200 RPM Barracudas that it supersedes. The lower rotational speed results in approximately 10% slower sequential transfer speeds and longer access times which make this drive less suitable for use as a system drive. With peak 4k read/write speeds of 0.76/1.2 MB/s the 4TB HDD.15 lags the group leaders significantly. The HDD.15 is a far better candidate for use in a NAS (Network Attached Storage) where factors such as power consumption and cost per GB are more important than outright speeds. To conclude, the HDD.15 has a relatively disappointing small file 4K performance profile but it does offer a huge amount of storage at a very competitive price which makes it a good candidate for use in a NAS. [Aug '13 HDrivePro]


Hard Drive Rankings (Price vs Performance) April 2017 HDD Rankings.

Welcome to our consumer Hard Drive comparison. We calculate effective speed which measures performance for typical consumers. Effective speed is adjusted by cost per GB to yield value for money. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top HDDs. Share your opinion by voting. [HDrivePro]

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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The Best.
Intel Core i7-7700K $300AMD RX 480 $238Samsung 850 Evo 250GB $100
Intel Core i5-7600K $229Nvidia GTX 1070 $330Samsung 850 Evo 500GB $170
Intel Pentium G4560 $60Nvidia GTX 1060-6GB $219Samsung 850 Pro 256GB $146
Seagate Barracuda 1TB (2016) $48Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $90G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46Corsair Vengeance LPX DDR4 3200 C16 2x8GB $136SanDisk Ultra Fit 32GB $13
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