Average Bench: 74.3% (590th of 1074)

more Based on 237,487 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 25.7% 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 113MB/s
Avg. 4K Random Read Speed 26.8MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Kingston A400 480GB is 62.1%. This is a particularly wide range which indicates that the Kingston A400 480GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 266MB/s
Avg. Sequential Mixed IO Speed 287MB/s

Average Bench

(Based on 237,487 samples)
Min Avg Max
185 Read 399 503
26.9 Write 302 451
31.7 Mixed 287 410
81.5 SusWrite 266 460
70.2% 313 MB/s
Min Avg Max
14 4K Read 26.8 36
12.1 4K Write 64.1 109
7.32 4K Mixed 26.9 41.8
109% 39.2 MB/s
Min Avg Max
21.3 DQ Read 180 282
14.8 DQ Write 234 355
14.5 DQ Mixed 113 216
111% 176 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
141GB free
Firmware: S3Z40107
SusWrite @10s intervals: 351 408 439 439 51 213 MB/s
Read 498
Write 431
Mixed 388
SusWrite 317
92% 408 MB/s
4K Read 30.2
4K Write 96.6
4K Mixed 28.4
133% 51.7 MB/s
DQ Read 147
DQ Write 301
DQ Mixed 38.2
82% 162 MB/s
249GB free
Firmware: SBFK61K1
SusWrite @10s intervals: 449 328 132 104 103 221 MB/s
Read 406
Write 124
Mixed 327
SusWrite 223
60% 270 MB/s
4K Read 33.9
4K Write 87.2
4K Mixed 38.1
146% 53.1 MB/s
DQ Read 260
DQ Write 305
DQ Mixed 189
168% 251 MB/s
144GB free
Firmware: SBFK61K1
SusWrite @10s intervals: 279 179 204 96 70 64 MB/s
Read 476
Write 152
Mixed 335
SusWrite 149
62% 278 MB/s
4K Read 30.2
4K Write 74.5
4K Mixed 34.3
129% 46.3 MB/s
DQ Read 260
DQ Write 304
DQ Mixed 185
166% 249 MB/s
297GB free
Firmware: SBFK71E0
SusWrite @10s intervals: 437 448 121 196 170 97 MB/s
Read 287
Write 104
Mixed 84.6
SusWrite 245
40% 180 MB/s
4K Read 16.8
4K Write 20.7
4K Mixed 28.6
73% 22 MB/s
DQ Read 276
DQ Write 311
DQ Mixed 180
167% 256 MB/s
106GB free
Firmware: S3Z40107
SusWrite @10s intervals: 171 370 17 67 69 111 MB/s
Read 512
Write 453
Mixed 391
SusWrite 134
83% 373 MB/s
4K Read 25.9
4K Write 87
4K Mixed 0.7
86% 37.9 MB/s
DQ Read 133
DQ Write 12.1
DQ Mixed 0.7
19% 48.5 MB/s
237,487 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,944,788 SSDs tested


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Typical A400 480GB Builds (Compare 16,567 builds) See popular component choices, score breakdowns and rankings
Gaming 44%
Speed boat
Desktop 80%
Workstation 41%
Speed boat

Motherboard: Gigabyte B450M DS3H - $75

EDIT WITH CUSTOM PC BUILDER Value: 94% - Outstanding Total price: $428

Popular A400 480GB compatible motherboards:

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Solid State Drive Rankings (Price vs Performance) May 2024 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

25 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.


2 years ago.

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


3 years ago.

i have the same freeze prolems its garbage


3 years ago.


Still better than HDD in most cases, but is probably the worst SSD around. Definitely not for boot/OS as it doesn't have dram. Write speeds will disappoint once it fills up (after 50%). It gets to 30 MB/s writing, much slower than HDD. I even got 15 MB/s writes when 75% was full. But good for gaming with its good read speed—Dec '20


20 months ago.

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


3 years 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.


9 months ago.

Awful performance coupled with instability. Avoid like the plague.


2 years 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.


22 months ago.

It's been reported to have lots of issues


3 years 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.


4 years ago.

Worst drive i have ever owned, freezes frequenltly, unusable


4 years 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


2 years ago.

No problems for me. Works just fine as expected.


4 years ago.

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


4 years ago.

needs DRAM as booting causes stutters on this one


2 years ago.

I don't recommend this even for a budget build. DO NOT use it as a system drive. Yes it'll be faster than a hard disk but the reliability is questionable. Buy yourself a dram ssd for system drive, don't cheap out on it this is very important. Terrible write speed

1074 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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