Average Bench: 44.5% (413th of 1015)

Based on 24,423 user benchmarks.  Models: ST3320418AS, ST332041 ST3320418AS, ST332041 8AS

Below average average bench

The Seagate ST3320418AS 320GB averaged 55.4% 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 0.9MB/s
Avg. 4K Random Write Speed 1.63MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Seagate ST3320418AS 320GB is 39.5%. This is a relatively wide range which indicates that the Seagate ST3320418AS 320GB performs inconsistently under varying real world conditions.


Avg. Sequential Mixed IO Speed 51.6MB/s
Avg. Sustained Write Speed 74.1MB/s

Average Bench

(Based on 24,423 samples)
Min Avg Max
30.2 Read 80.8 103
26.9 Write 75.6 102
22 Mixed 51.6 64.1
25.5 SusWrite 74.1 105
51.9% 70.5 MB/s
Min Avg Max
0.3 4K Read 0.64 0.8
0.89 4K Write 1.63 2
0.49 4K Mixed 0.9 1.1
157% 1.06 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest HDD (mainstream) averages a speed of 100%
298GB free
Firmware: HP35
SusWrite @10s intervals: 97 95 98 97 98 97 MB/s
Read 100
Write 53.1
Mixed 60.6
SusWrite 97.2
57% 77.7 MB/s
4K Read 0.6
4K Write 1.9
4K Mixed 0.9
160% 1.13 MB/s
280GB free (System drive)
Firmware: HP34
SusWrite @10s intervals: 80 91 96 69 94 88 MB/s
Read 103
Write 91
Mixed 13.1
SusWrite 86.4
53% 73.3 MB/s
4K Read 0.7
4K Write 0.3
4K Mixed 0.3
68% 0.43 MB/s
267GB free (System drive)
Firmware: CC46
SusWrite @10s intervals: 77 80 93 90 86 93 MB/s
Read 91
Write 94.2
Mixed 46.6
SusWrite 86.3
58% 79.5 MB/s
4K Read 0.6
4K Write 1.8
4K Mixed 1
169% 1.13 MB/s
269GB free
Firmware: HP34
SusWrite @10s intervals: 101 102 101 102 102 102 MB/s
Read 69.4
Write 47.7
Mixed 54.1
SusWrite 102
50% 68.2 MB/s
4K Read 0.7
4K Write 1.5
4K Mixed 1
168% 1.07 MB/s
24,423 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 39,656,106 HDDs tested.


AmazonUS $351 min
EbayUS $6018 mins
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Typical ST3320418AS 320GB Builds (Compare 38,546 builds) See popular component choices, score breakdowns and rankings.
Gaming 2%
Tree trunk
Desktop 64%
Workstation 2%
Tree trunk

Disqualified System: bin bin

EDIT WITH CUSTOM PC BUILDER Value: 67% - Good Total price: $329

Popular ST3320418AS 320GB systems:

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.
  • - 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.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
Hard Drive Rankings (Price vs Performance) July 2021 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.


3 years ago.

it became too slow after some month using it

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 i5-11400F $268Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11600K $270Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-10700K $304Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $78
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $29Corsair Vengeance LPX DDR4 3000 C15 2x8GB $85SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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