Average Bench: 78.8% (448th of 1016)

more Based on 33,372 user benchmarks.  Models: KINGSTON SA400S37480G, KINGSTON SA400S37480, KINGSTON SA400S37480G, KINGSTON SA400S37480G, KINGSTON SA400S3748, KINGSTON SA400S3, KINGSTON SA400S37120G

Good average bench

The Kingston A400 480GB averaged 21.1% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Kingston A400 480GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 142MB/s
Avg. 4K Random Read Speed 27.4MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Kingston A400 480GB is 63.9%. This is a particularly wide range which indicates that the Kingston A400 480GB performs inconsistently under varying real world conditions.


Avg. Sequential Write Speed 292MB/s
Avg. Sequential Mixed IO Speed 292MB/s

Average Bench

(Based on 33,372 samples)
Min Avg Max
159 Read 365 494
97.8 Write 292 458
40.2 Mixed 292 381
73.6 SusWrite 303 463
70.4% 313 MB/s
Min Avg Max
13.5 4K Read 27.4 36
14.4 4K Write 69 96.9
2.12 4K Mixed 30.3 41.3
117% 42.2 MB/s
Min Avg Max
14.5 DQ Read 199 277
15.5 DQ Write 257 357
14.4 DQ Mixed 142 215
131% 199 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
278GB free
Firmware: SBFKK1B3
SusWrite @10s intervals: 384 423 443 444 455 455 MB/s
Read 368
Write 338
Mixed 335
SusWrite 434
83% 369 MB/s
4K Read 33.5
4K Write 95.4
4K Mixed 39.6
152% 56.2 MB/s
DQ Read 220
DQ Write 340
DQ Mixed 172
160% 244 MB/s
205GB free
Firmware: SBFKB1C3
SusWrite @10s intervals: 338 196 188 195 351 195 MB/s
Read 354
Write 134
Mixed 353
SusWrite 244
61% 271 MB/s
4K Read 33.7
4K Write 93.6
4K Mixed 42.8
156% 56.7 MB/s
DQ Read 253
DQ Write 331
DQ Mixed 190
172% 258 MB/s
400GB free (System drive)
Firmware: SBFKK1B3
SusWrite @10s intervals: 228 358 372 381 392 396 MB/s
Read 361
Write 405
Mixed 303
SusWrite 354
80% 356 MB/s
4K Read 22.6
4K Write 69.9
4K Mixed 29.8
109% 40.8 MB/s
DQ Read 214
DQ Write 278
DQ Mixed 167
148% 220 MB/s
300GB free (System drive)
Firmware: SBFKB1D1
SusWrite @10s intervals: 316 267 306 271 273 323 MB/s
Read 184
Write 97.6
Mixed 82.9
SusWrite 292
37% 164 MB/s
4K Read 14.3
4K Write 19.5
4K Mixed 10.8
46% 14.9 MB/s
DQ Read 14.6
DQ Write 15.7
DQ Mixed 14.6
11% 15 MB/s
33,372 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 21,624,497 SSDs tested.


OutletPCUS $531 day
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Typical A400 480GB Builds (Compare 26,164 builds) See popular component choices, score breakdowns and rankings.
Gaming 56%
Desktop 67%
Battle cruiser
Workstation 58%

Motherboard: Gigabyte B450M DS3H - $68

EDIT WITH CUSTOM PC BUILDER Value: 84% - Excellent Total price: $463

Popular A400 480GB compatible motherboards:

How Fast Is Your SSD? (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.

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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.
  • - 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.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) January 2020 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. 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 SSDs. [SSDrivePro]


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.


Controller: Phison PS3111-S11. Flash Memory: Toshiba 15nm TLC

Added n/a ago.

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20 days ago.

complete garbage, needs a firmware update, freezes and stutters for 5-20 seconds every few minutes, makes for anything but the most basic of internet browsing/youtube checking impossible or mind numbingly annoying to do.


4 months ago.

terrible performance. absolutely unusable as a main drive, so much stuttering, freezing and slow loading speeds


1 month ago.

OS (win10 and linux mint 19) freezes and stutters for a few seconds when installed on this SSD.


9 months ago.

Cheap drive that is suitable for gaming, but performs poorly in Windows and can stutter/freeze with heavy usage. Kingston should release a new firmware to address these issues.


2 months ago.

i need some opinion, do u guys encounter freeze in game while put this A400 on main drive windows, i get freeze game on csgo and pubg everytime i play on it.


8 months ago.

Poor write performance, its fast when its empty ~ 200MB/s, however when it passes 20%, it becomes terrible, about 40-50MB/s, on occasion it drops below 10. On linux its useless, ubuntu 18 freezes every few minutes.


15 days ago.

Worst drive i have ever owned, freezes frequenltly, unusable


3 months ago.

i use it for a while and i can say all good things about this SSD, it is not the fastest around but for the price is everything u looked for and that's it! Thumbs up! Good SSD from 1 to 5 = solid 4


7 months ago.

Has a freezing problem, kingston need to update the firmware on these things


1 month ago.

needs DRAM as booting causes stutters on this one

1016 Drives (Compared) Thousands of user benchmarks compiled into one comparison list.

See how consistently different SSDs perform with varying real world conditions. The charts also illustrate overall performance, popularity and rank.

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