Real World Speed
Performance profile from 8,186 user samples
3,848 User Benchmarks
Best Bench: 59% 666GB free
Worst Bench: 35% 137GB free
Poor: 35% Great: 59%
SPEED RANK: 369th / 984
4,338 User Benchmarks
Best Bench: 101% 3TB free
Worst Bench: 63% 3TB free
Poor: 63% Great: 101%
SPEED RANK: 44th / 984
Effective Speed
Effective HDD Speed
47.9 % -79% 85.7 % Much faster effective speed.
Avg. Sequential Read Speed
83.5 MB/s -83% 153 MB/s Hugely faster read speed.
Avg. Sequential Write Speed
83.5 MB/s -75% 146 MB/s Much faster write speed.
4K Read
Avg. 4K Random Read Speed
0.54 MB/s -13% 0.61 MB/s Slightly faster random read.
4K Write
Avg. 4K Random Write Speed
0.93 MB/s -86% 1.73 MB/s Hugely faster random write.
Avg. Sequential Mixed IO Speed
76.9 MB/s -59% 122 MB/s Much faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
0.27 MB/s Slightly faster random mixed IO.
0.24 MB/s -13%
Peak Sequential Read Speed
104 MB/s -74% 181 MB/s Much faster peak read speed.
Peak Sequential Write Speed
104 MB/s -73% 180 MB/s Much faster peak write speed.
4K Read
Peak 4K Random Read Speed
0.75 MB/s +1% 0.74 MB/s -1%
4K Write
Peak 4K Random Write Speed
1.3 MB/s -65% 2.14 MB/s Much faster peak random write.
Peak Sequential Mixed IO Speed
98.5 MB/s -54% 152 MB/s Much faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
0.34 MB/s Faster peak random mixed IO.
0.29 MB/s -17%
Market Share
Based on 7,179,713 HDDs tested.
Market Share
Market Share (trailing 30 days)
0.04 % -375% 0.19 % Hugely higher market share.
Value For Money
17.2 % -503% 104 % Hugely better value.
User Rating
UBM User Rating
52 % -35% 70 % Much more popular.
Price (score)
$40 Much cheaper.
$95 -58%
92 Months -83% 16 Months Hugely more recent.
500GB 4TB

The Momentus XT is a 7200 rpm low power Laptop SSHD (Solid State Hard Drive). The XT is one of the early SSHD models and at nearly four years of age it's now over the hill and struggles to keep up with newer drives. With peak sequential speeds in the region of 100 MB/s the Momentus is approximately 70% slower than the current group leaders. Most SSHDs offer relatively good small file 4K read and write performance but that isn't the case for the Momentus XT which only averages 0.6 MB/s in the random 4K tests. There are far better alternatives currently available for the same money. [Jan '14 HDrivePro]


Hard Drive Rankings (Price vs Performance) January 2018 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

 Best User Rated

The Best.
Intel Core i7-7700K $280Nvidia GTX 1070 $430Samsung 850 Evo 250GB $87
AMD Ryzen 7 1700 $270Nvidia GTX 1060-6GB $275Samsung 850 Evo 500GB $140
Intel Core i5-7600K $210AMD RX 480 $400Samsung 850 Pro 256GB $110
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $65
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $220SanDisk Ultra Fit 32GB $12
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