Average Bench: 74.3% (514th of 1011)

more Based on 21,292 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 25.6% 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-64Thread Mixed IO Speed 136MB/s
Avg. 4K Random Read Speed 26.6MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Kingston A400 480GB is 60%. This is a particularly wide range which indicates that the Kingston A400 480GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 243MB/s
Avg. Sequential Write Speed 259MB/s

Average Bench

(Based on 21,292 samples)
Min Avg Max
168 Read 363 497
96.8 Write 259 453
81.2 Mixed 283 405
68.6 SusWrite 243 453
64.3% 287 MB/s
Min Avg Max
12.5 4K Read 26.6 37
18.1 4K Write 67.4 98.5
10 4K Mixed 29.5 42.2
114% 41.1 MB/s
Min Avg Max
14.5 DQ Read 208 282
15.5 DQ Write 253 351
14.4 DQ Mixed 136 218
129% 199 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
219GB free
Firmware: SBFK61K1
SusWrite @10s intervals: 392 341 103 105 106 104 MB/s
Read 461
Write 346
Mixed 326
SusWrite 192
74% 331 MB/s
4K Read 35
4K Write 72.9
4K Mixed 36.5
138% 48.1 MB/s
DQ Read 274
DQ Write 320
DQ Mixed 217
186% 270 MB/s
221GB free (System drive)
Firmware: SBFK61K1
SusWrite @10s intervals: 421 188 99 100 101 100 MB/s
Read 467
Write 322
Mixed 349
SusWrite 168
73% 327 MB/s
4K Read 32.2
4K Write 87.3
4K Mixed 35.6
141% 51.7 MB/s
DQ Read 268
DQ Write 314
DQ Mixed 188
170% 256 MB/s
403GB free (System drive)
Firmware: SBFK71E0
SusWrite @10s intervals: 407 400 399 402 388 387 MB/s
Read 393
Write 386
Mixed 330
SusWrite 397
85% 377 MB/s
4K Read 21.4
4K Write 84.1
4K Mixed 27.8
113% 44.4 MB/s
DQ Read 144
DQ Write 324
DQ Mixed 45.7
89% 171 MB/s
422GB free
Firmware: SBFKB1D1
SusWrite @10s intervals: 293 239 250 308 271 319 MB/s
Read 254
Write 107
Mixed 322
SusWrite 280
54% 241 MB/s
4K Read 28.8
4K Write 63.4
4K Mixed 34.4
121% 42.2 MB/s
DQ Read 273
DQ Write 300
DQ Mixed 211
180% 261 MB/s
21,292 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 19,104,221 SSDs tested.


AmazonUS $5010 mins
EbayUS $5217 mins
OutletPCUS $532 days
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Typical A400 480GB Builds (Compare 18,509 builds) See popular component choices, score breakdowns and rankings.
Gaming 53%
Desktop 66%
Battle cruiser
Workstation 57%

Motherboard: Gigabyte B450M DS3H - $71

EDIT WITH CUSTOM PC BUILDER Value: 78% - Very good Total price: $476

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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  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
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Solid State Drive Rankings (Price vs Performance) November 2019 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.

Good (edit your comment) Add link

2 months 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.


2 months ago.

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


11 months ago.

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


6 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.


4 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.


5 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.


19 days 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


5 months ago.

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


1 month ago.

Satisfyingly fast boot times.

1011 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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