Average Bench: 73.8% (582nd of 1058)

more Based on 240,738 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 26.2% 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 117MB/s
Avg. 4K Random Read Speed 27MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Kingston A400 480GB is 62.4%. This is a particularly wide range which indicates that the Kingston A400 480GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 256MB/s
Avg. Sequential Mixed IO Speed 272MB/s

Average Bench

(Based on 240,738 samples)
Min Avg Max
171 Read 392 503
25.8 Write 290 452
28.8 Mixed 272 407
71.1 SusWrite 256 456
67.8% 303 MB/s
Min Avg Max
12.8 4K Read 27 37.2
12.1 4K Write 64.3 107
6.91 4K Mixed 27.2 42.8
110% 39.5 MB/s
Min Avg Max
18 DQ Read 182 283
15.2 DQ Write 235 354
14.3 DQ Mixed 117 216
114% 178 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
46GB free
Firmware: SBFKK1B3
SusWrite @10s intervals: 466 468 470 470 471 471 MB/s
Read 422
Write 214
Mixed 379
SusWrite 469
84% 371 MB/s
4K Read 33
4K Write 98.2
4K Mixed 40.3
154% 57.2 MB/s
DQ Read 217
DQ Write 357
DQ Mixed 170
162% 248 MB/s
143GB free
Firmware: SBFKK1C3
SusWrite @10s intervals: 218 448 454 461 468 468 MB/s
Read 416
Write 448
Mixed 28.6
SusWrite 419
74% 328 MB/s
4K Read 28
4K Write 16.6
4K Mixed 9.6
64% 18.1 MB/s
DQ Read 33.9
DQ Write 13.6
DQ Mixed 16.6
14% 21.4 MB/s
125GB free (System drive)
Firmware: S3701101
SusWrite @10s intervals: 219 72 39 63 48 69 MB/s
Read 372
Write 394
Mixed 109
SusWrite 84.8
53% 240 MB/s
4K Read 28.3
4K Write 62.8
4K Mixed 12.6
92% 34.6 MB/s
DQ Read 180
DQ Write 309
DQ Mixed 118
125% 202 MB/s
234GB free (System drive)
Firmware: S1Z40102
SusWrite @10s intervals: 200 84 2.7 181 7.7 4.5 MB/s
Read 486
Write 410
Mixed 408
SusWrite 79.8
77% 346 MB/s
4K Read 32.3
4K Write 7.5
4K Mixed 0.5
54% 13.4 MB/s
240,738 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 57,591,321 SSDs tested.


AmazonUS $3521 hrs
EbayUS $4319 mins
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Typical A400 480GB Builds (Compare 85,064 builds) See popular component choices, score breakdowns and rankings.
Gaming 48%
Desktop 80%
Aircraft carrier
Workstation 45%
Speed boat

Motherboard: Gigabyte B450M DS3H - $68

EDIT WITH CUSTOM PC BUILDER Value: 76% - Very good Total price: $532

Popular A400 480GB compatible motherboards:

How Fast Is Your SSD? (Bench your build) Size up your PC in less than a minute.

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  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
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  • - RAM tests include: single/multi core bandwidth and latency.
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  • - Reports are generated and presented on userbenchmark.com.
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Solid State Drive Rankings (Price vs Performance) August 2022 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

5 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.


9 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


17 months 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


21 months ago.

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


1 month ago.

Pretty bad, it started with write issues in less than a year, it has good read speed but its slower than an HDD to write...


2 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.


1 month ago.

It's been reported to have lots of issues


14 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.


20 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.


2 years ago.

Worst drive i have ever owned, freezes frequenltly, unusable


2 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


7 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


2 years ago.

needs DRAM as booting causes stutters on this one


9 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

1058 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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