Average Bench: 77% (501st of 1037)

more Based on 73,851 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 22.9% 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 129MB/s
Avg. 4K Random Read Speed 26.4MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Kingston A400 480GB is 62.2%. This is a particularly wide range which indicates that the Kingston A400 480GB performs inconsistently under varying real world conditions.


Avg. Sequential Mixed IO Speed 286MB/s
Avg. Sequential Write Speed 295MB/s

Average Bench

(Based on 73,851 samples)
Min Avg Max
187 Read 384 502
50.9 Write 295 451
38.3 Mixed 286 402
84 SusWrite 302 462
71.1% 317 MB/s
Min Avg Max
14 4K Read 26.4 34
12.6 4K Write 66.2 98.2
7.42 4K Mixed 28 40.7
111% 40.2 MB/s
Min Avg Max
17 DQ Read 187 272
13.6 DQ Write 245 355
14.4 DQ Mixed 129 215
122% 187 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
244GB free (System drive)
Firmware: SBFKK1B3
SusWrite @10s intervals: 414 403 437 445 449 447 MB/s
Read 418
Write 242
Mixed 356
SusWrite 433
81% 362 MB/s
4K Read 30.3
4K Write 85
4K Mixed 36
137% 50.4 MB/s
DQ Read 220
DQ Write 323
DQ Mixed 168
156% 237 MB/s
240GB free (System drive)
Firmware: SBFKK1B3
SusWrite @10s intervals: 335 400 457 460 460 462 MB/s
Read 414
Write 429
Mixed 356
SusWrite 429
92% 407 MB/s
4K Read 28.9
4K Write 74.9
4K Mixed 34.7
128% 46.2 MB/s
DQ Read 218
DQ Write 277
DQ Mixed 168
149% 221 MB/s
421GB free
Firmware: SBFKB1E1
SusWrite @10s intervals: 165 225 253 288 240 270 MB/s
Read 299
Write 100
Mixed 262
SusWrite 240
50% 225 MB/s
4K Read 23.8
4K Write 57.3
4K Mixed 27.4
102% 36.2 MB/s
DQ Read 251
DQ Write 282
DQ Mixed 209
174% 248 MB/s
73,851 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 31,534,447 SSDs tested.


AmazonUS $475 mins
EbayUS $5012 mins
OutletPCUS $538 months
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Typical A400 480GB Builds (Compare 31,856 builds) See popular component choices, score breakdowns and rankings.
Gaming 50%
Desktop 82%
Aircraft carrier
Workstation 46%

Motherboard: Gigabyte B450M DS3H - $73

EDIT WITH CUSTOM PC BUILDER Value: 83% - Excellent Total price: $495

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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  • - CPU tests include: integer, floating and string.
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Solid State Drive Rankings (Price vs Performance) September 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.

Excellent (edit your comment) Add link

2 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.


3 months ago.

Started getting really slow and inconsistent after 1 and a half years


2 months ago.

i have the same freeze prolems its garbage


3 months ago.

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


14 days ago.

It's been reported to have lots of issues


3 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.


16 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.


8 months ago.

Worst drive i have ever owned, freezes frequenltly, unusable


11 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


15 months ago.

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


9 months ago.

needs DRAM as booting causes stutters on this one

1037 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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