Average Bench: 73.4% (587th of 1058)

more Based on 166,347 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 26.5% 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 110MB/s
Avg. 4K Random Read Speed 25.9MB/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. Sequential Mixed IO Speed 270MB/s
Avg. Sustained Write Speed 274MB/s

Average Bench

(Based on 166,347 samples)
Min Avg Max
204 Read 395 507
28.3 Write 306 451
28.5 Mixed 270 402
67.5 SusWrite 274 457
69.7% 311 MB/s
Min Avg Max
12.9 4K Read 25.9 34.2
11.5 4K Write 62.5 106
7.21 4K Mixed 26 40.5
106% 38.2 MB/s
Min Avg Max
16.3 DQ Read 174 272
13.5 DQ Write 226 355
13.4 DQ Mixed 110 213
108% 170 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
114GB free (System drive)
Firmware: SBFKK1B3
SusWrite @10s intervals: 368 280 3 2.9 3.2 3 MB/s
Read 417
Write 180
Mixed 339
SusWrite 110
58% 262 MB/s
4K Read 31.8
4K Write 88.6
4K Mixed 37.1
143% 52.5 MB/s
DQ Read 219
DQ Write 301
DQ Mixed 169
153% 230 MB/s
249GB free
Firmware: SBFKB1D1
SusWrite @10s intervals: 347 253 255 259 360 261 MB/s
Read 326
Write 172
Mixed 265
SusWrite 289
59% 263 MB/s
4K Read 21.4
4K Write 74
4K Mixed 29.4
109% 41.6 MB/s
DQ Read 252
DQ Write 276
DQ Mixed 211
174% 246 MB/s
38GB free
Firmware: 03160102
SusWrite @10s intervals: 353 341 322 75 15 22 MB/s
Read 314
Write 404
Mixed 343
SusWrite 188
70% 312 MB/s
4K Read 32.3
4K Write 61.4
4K Mixed 38.9
131% 44.2 MB/s
DQ Read 167
DQ Write 154
DQ Mixed 129
106% 150 MB/s
118GB free (System drive)
Firmware: S3401103
SusWrite @10s intervals: 18 137 114 51 282 12 MB/s
Read 465
Write 368
Mixed 366
SusWrite 102
73% 326 MB/s
4K Read 24.7
4K Write 63.3
4K Mixed 21.7
99% 36.6 MB/s
DQ Read 144
DQ Write 226
DQ Mixed 100
100% 157 MB/s
154GB free (System drive)
Firmware: SBFKB1E1
SusWrite @10s intervals: 235 23 31 32 37 29 MB/s
Read 297
Write 99.4
Mixed 247
SusWrite 64.3
39% 177 MB/s
4K Read 19.9
4K Write 63.5
4K Mixed 27.8
99% 37.1 MB/s
DQ Read 225
DQ Write 255
DQ Mixed 131
129% 204 MB/s
166,347 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 47,076,397 SSDs tested.


AmazonUS $4915 mins
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Typical A400 480GB Builds (Compare 67,177 builds) See popular component choices, score breakdowns and rankings.
Gaming 48%
Desktop 81%
Aircraft carrier
Workstation 44%
Speed boat

Motherboard: Gigabyte B450M DS3H - $68

EDIT WITH CUSTOM PC BUILDER Value: 70% - Good Total price: $598

Popular A400 480GB compatible motherboards:

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  • - CPU tests include: integer, floating and string.
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Solid State Drive Rankings (Price vs Performance) September 2021 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 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 months ago.

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


14 months ago.

i have the same freeze prolems its garbage


6 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


5 months ago.

One of the worse SSDs around, still miles and miles better than booting from a Hard Drive. It doesn't have a NAND cache which is unfortunate and might hurt longevity. Pricewise this is also probably the cheapest you can find which is why it's so popular. Do not get the 120GB version though since SSDs slow down massively once they get filled up.


10 months ago.

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


16 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.


1 month ago.

It's been reported to have lots of issues


3 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.


9 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.


20 months ago.

Worst drive i have ever owned, freezes frequenltly, unusable


23 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


2 years ago.

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


21 months ago.

needs DRAM as booting causes stutters on this one

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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