Average Bench: 38.3% (558th of 995)

more Based on 2,421 user benchmarks.  Models: ST320LT020-9YG142, ST320LT020-9YG1, ST320LT0 ST320LT020-9YG14, ST320LT020-9YG14, ST320LT0 20-9YG142, ST320LT0 ST320LT020-9YG1

Poor average bench

The Seagate Momentus Thin 5400 2.5" 320GB averaged 61.6% 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 0.2MB/s
Avg. Sequential Read Speed 67.5MB/s

Good consistency

The range of scores (95th - 5th percentile) for the Seagate Momentus Thin 5400 2.5" 320GB is 21.5%. This is a relatively narrow range which indicates that the Seagate Momentus Thin 5400 2.5" 320GB performs reasonably consistently under varying real world conditions.


Avg. 4K Random Write Speed 0.69MB/s
Avg. 4K Random Read Speed 0.32MB/s

Average Bench

(Based on 2,421 samples)
Min Avg Max
47.8 Read 67.5 83.8
43.6 Write 66.2 84.2
10.4 Mixed 55.6 78.8
47.3% 63.1 MB/s
Min Avg Max
0.08 4K Read 0.32 0.49
0.27 4K Write 0.69 1.03
0.06 4K Mixed 0.2 0.43
48.1% 0.4 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
42GB free
Firmware: 0001SDM1 Max speed: SATA 2.0 300 MB/s
Read 84.2
Write 77.7
Mixed 62
56% 74.6 MB/s
4K Read 0.32
4K Write 0.54
4K Mixed 0.33
60% 0.4 MB/s
114GB free
Firmware: 0002HPM1 Max speed: SATA 2.0 300 MB/s
Read 75.7
Write 70.1
Mixed 64.4
53% 70.1 MB/s
4K Read 0.26
4K Write 0.8
4K Mixed 0.26
55% 0.44 MB/s
168GB free
Firmware: 0001SDM1 Max speed: SATA 2.0 300 MB/s
Read 70.1
Write 66.4
Mixed 63.6
50% 66.7 MB/s
4K Read 0.33
4K Write 0.59
4K Mixed 0.16
43% 0.36 MB/s
107GB free
Firmware: 0010 Max speed: SATA 2.0 300 MB/s
Read 63.5
Write 54.8
Mixed 52.5
43% 56.9 MB/s
4K Read 0.06
4K Write 0.15
4K Mixed 0.04
9% 0.08 MB/s
282GB free
Firmware: 0010SDM1 Max speed: SATA 2.0 300 MB/s
Read 54.9
Write 59.1
Mixed 66.3
46% 60.1 MB/s
4K Read 0.34
4K Write 0.46
4K Mixed 0.23
48% 0.34 MB/s
2,421 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 8,299,772 HDDs tested.


AmazonUS $352 years
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Typical Momentus Thin 5400 2.5" 320GB Builds (Compare 5,751 builds) See popular component choices, score breakdowns and rankings.
Gaming 13%
Tree trunk
Desktop 43%
Speed boat
Workstation 17%

System: HP Pavilion g6 Notebook PC

EDIT WITH CUSTOM PC BUILDER Value: 69% - Good Total price: $240

Popular Momentus Thin 5400 2.5" 320GB systems:

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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.


995 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 i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $85
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $150
AMD Ryzen 5 1600 $188AMD RX 480 $400Samsung 850 Pro 256GB $146
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $190SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $216SanDisk Extreme 16GB $18
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