Average Bench: 74.3% (587th of 1071)

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 Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
383GB free (System drive)
Firmware: SBFKK1C3
SusWrite @10s intervals: 370 363 378 384 409 421 MB/s
Read 399
Write 321
Mixed 307
SusWrite 388
80% 354 MB/s
4K Read 29.4
4K Write 73.1
4K Mixed 31.2
123% 44.6 MB/s
DQ Read 218
DQ Write 337
DQ Mixed 169
158% 241 MB/s
95GB free (System drive)
Firmware: S3Z40107
SusWrite @10s intervals: 307 35 290 16 113 11 MB/s
Read 506
Write 431
Mixed 392
SusWrite 129
81% 364 MB/s
4K Read 22.8
4K Write 76.4
4K Mixed 27
110% 42.1 MB/s
DQ Read 163
DQ Write 328
DQ Mixed 43.9
91% 178 MB/s
445GB free
Firmware: S3H01103
SusWrite @10s intervals: 308 202 138 96 63 77 MB/s
Read 444
Write 341
Mixed 125
SusWrite 147
59% 264 MB/s
4K Read 26.2
4K Write 69.9
4K Mixed 18.8
101% 38.3 MB/s
DQ Read 182
DQ Write 330
DQ Mixed 86.4
114% 200 MB/s
43GB free
Firmware: S3H0
SusWrite @10s intervals: 334 305 196 67 59 60 MB/s
Read 357
Write 290
Mixed 280
SusWrite 170
61% 274 MB/s
4K Read 26.4
4K Write 38.1
4K Mixed 22.3
89% 28.9 MB/s
DQ Read 166
DQ Write 158
DQ Mixed 103
93% 142 MB/s
235GB free
Firmware: SBFKB1D1
SusWrite @10s intervals: 347 290 334 301 322 319 MB/s
Read 184
Write 96.3
Mixed 76.8
SusWrite 319
38% 169 MB/s
4K Read 12.5
4K Write 18.9
4K Mixed 9.8
42% 13.7 MB/s
DQ Read 14.6
DQ Write 15.7
DQ Mixed 85.5
45% 38.6 MB/s
237,487 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 67,504,697 SSDs tested.


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Typical A400 480GB Builds (Compare 13,878 builds) See popular component choices, score breakdowns and rankings.
Gaming 44%
Speed boat
Desktop 79%
Workstation 40%
Speed boat

Motherboard: Gigabyte B450M DS3H - $85

EDIT WITH CUSTOM PC BUILDER Value: 83% - Excellent Total price: $497

Popular A400 480GB compatible motherboards:

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Solid State Drive Rankings (Price vs Performance) June 2023 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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14 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.


19 months ago.

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


2 years ago.

i have the same freeze prolems its garbage


2 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


8 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.


24 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.


10 months ago.

It's been reported to have lots of issues


2 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.


3 years ago.

Worst drive i have ever owned, freezes frequenltly, unusable


3 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


16 months ago.

No problems for me. Works just fine as expected.


3 years ago.

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


3 years ago.

needs DRAM as booting causes stutters on this one


19 months 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

1071 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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