Average Bench: 42.6% (450th of 1015)

more Based on 43,234 user benchmarks.  Models: ST9500420AS, Seagate ST9500420AS, ST950042 4AS, ST950042 3AS, ST950042 0ASG, ST9500423AS, ST9500424AS, ST950042 ST9500424AS, ST950042 0AS, ST950042 ST9500423AS, ST950042 ST9500420AS, ST950042 ST9500420ASG, ST9500420ASG

Below average average bench

The Seagate Momentus 2.5" 500GB averaged 57.3% 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.


Avg. 4K Random Mixed IO Speed 0.65MB/s
Avg. 4K Random Read Speed 0.54MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Seagate Momentus 2.5" 500GB is 39.4%. This is a relatively wide range which indicates that the Seagate Momentus 2.5" 500GB performs inconsistently under varying real world conditions.


Avg. Sequential Mixed IO Speed 44.4MB/s
Avg. Sustained Write Speed 73.3MB/s

Average Bench

(Based on 43,234 samples)
Min Avg Max
23.1 Read 75.2 101
27.1 Write 73.4 99.7
19.7 Mixed 44.4 57.2
28.2 SusWrite 73.3 102
48.9% 66.6 MB/s
Min Avg Max
0.2 4K Read 0.54 0.7
0.5 4K Write 0.98 1.4
0.3 4K Mixed 0.65 0.8
113% 0.73 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
466GB free
Firmware: 0004HPM1
SusWrite @10s intervals: 81 80 82 82 81 81 MB/s
Read 103
Write 80.3
Mixed 62.1
SusWrite 81.1
60% 81.7 MB/s
4K Read 0.6
4K Write 1.3
4K Mixed 0.7
127% 0.87 MB/s
353GB free (System drive)
Firmware: 0006HPM1
SusWrite @10s intervals: 79 84 81 83 84 83 MB/s
Read 81.1
Write 63.6
Mixed 41.5
SusWrite 82.2
49% 67.1 MB/s
4K Read 0.6
4K Write 1.3
4K Mixed 0.8
138% 0.9 MB/s
353GB free (System drive)
Firmware: 0002SDM1
SusWrite @10s intervals: 49 24 50 68 74 81 MB/s
Read 76.5
Write 75.2
Mixed 45.6
SusWrite 57.6
47% 63.7 MB/s
4K Read 0.6
4K Write 1.1
4K Mixed 0.8
134% 0.83 MB/s
425GB free (System drive)
Firmware: 0006HPM1
SusWrite @10s intervals: 71 72 40 70 37 31 MB/s
Read 64.8
Write 59.2
Mixed 47.9
SusWrite 53.5
42% 56.3 MB/s
4K Read 0.6
4K Write 1.2
4K Mixed 0.8
136% 0.87 MB/s
43,234 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 45,949,856 HDDs tested.


AmazonUS $5334 secs
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Typical Momentus 2.5" 500GB Builds (Compare 8,964 builds) See popular component choices, score breakdowns and rankings.
Gaming 2%
Tree trunk
Desktop 54%
Workstation 2%
Tree trunk

System: HP Pavilion dv6 Notebook PC

EDIT WITH CUSTOM PC BUILDER Value: 62% - Good Total price: $222

Popular Momentus 2.5" 500GB systems:

How Fast Is Your HDD? (Bench your build) Size up your PC in less than a minute.

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  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - SkillBench (space shooter) tests user input accuracy.
  • - Reports are generated and presented on userbenchmark.com.
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Hard Drive Rankings (Price vs Performance) August 2022 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.
  • 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.


Added n/a ago.

Poor (edit your comment) Add link

3 years ago.

It's a little louder, buzzier and hotter than other HDD. Pretty slow, but that could be because I have it in a USB 2.0 enclosure.


2 years ago.

This is barely fast enough to be used as a hard drive to have games on

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

 Best User Rated

The Best.
Intel Core i5-12600K $275Nvidia RTX 3060-Ti $470Crucial MX500 250GB $40
Intel Core i5-12400F $160Nvidia RTX 3070 $535Samsung 850 Evo 120GB $106
Intel Core i7-12700K $350Nvidia RTX 3050 $325Samsung 860 Evo 250GB $52
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $58SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $33Corsair Vengeance LPX DDR4 3000 C15 2x8GB $64SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $449SanDisk Ultra Fit 32GB $16
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