Average Bench: 75.2% (536th of 1040)

more Based on 119,910 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 24.8% 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 121MB/s
Avg. 4K Random Read Speed 26.1MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Kingston A400 480GB is 63.5%. 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 277MB/s
Avg. 4K-64Thread Read Speed 178MB/s

Average Bench

(Based on 119,910 samples)
Min Avg Max
178 Read 380 507
27.8 Write 287 455
25.6 Mixed 277 396
87.3 SusWrite 301 466
69.8% 311 MB/s
Min Avg Max
13.4 4K Read 26.1 34.7
11.6 4K Write 62.4 103
5.65 4K Mixed 26.7 41.7
107% 38.4 MB/s
Min Avg Max
14.3 DQ Read 178 272
14.7 DQ Write 238 354
14.1 DQ Mixed 121 216
116% 179 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
446GB free
Firmware: SBFKK1B3
SusWrite @10s intervals: 406 422 432 453 427 437 MB/s
Read 374
Write 402
Mixed 337
SusWrite 430
87% 386 MB/s
4K Read 26
4K Write 78.6
4K Mixed 32.4
122% 45.7 MB/s
DQ Read 220
DQ Write 341
DQ Mixed 169
159% 243 MB/s
382GB free
Firmware: SBFKK1C3
SusWrite @10s intervals: 374 400 410 420 413 416 MB/s
Read 376
Write 196
Mixed 323
SusWrite 405
73% 325 MB/s
4K Read 28.7
4K Write 83.5
4K Mixed 38.1
136% 50.1 MB/s
DQ Read 28.2
DQ Write 106
DQ Mixed 34.6
36% 56.4 MB/s
380GB free (System drive)
Firmware: SBFKB1D1
SusWrite @10s intervals: 293 252 295 269 273 298 MB/s
Read 300
Write 103
Mixed 83.5
SusWrite 280
42% 192 MB/s
4K Read 17.2
4K Write 19.7
4K Mixed 11.9
52% 16.3 MB/s
DQ Read 14.4
DQ Write 15.3
DQ Mixed 14.7
11% 14.8 MB/s
384GB free (System drive)
Firmware: SBFKB1D1
SusWrite @10s intervals: 314 270 321 276 280 325 MB/s
Read 246
Write 103
Mixed 88.7
SusWrite 298
41% 184 MB/s
4K Read 18.3
4K Write 20.3
4K Mixed 12.3
54% 17 MB/s
DQ Read 14.1
DQ Write 15.2
DQ Mixed 14.5
11% 14.6 MB/s
240GB free (System drive)
Firmware: SBFKB1C2
SusWrite @10s intervals: 269 181 182 176 195 196 MB/s
Read 150
Write 287
Mixed 161
SusWrite 200
45% 199 MB/s
4K Read 6.7
4K Write 55.4
4K Mixed 2.1
42% 21.4 MB/s
DQ Read 10.8
DQ Write 194
DQ Mixed 59.6
59% 88.1 MB/s
119,910 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 38,350,840 SSDs tested.


AmazonUS $4710 mins
OutletPCUS $5312 months
EbayUS $5618 mins
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Typical A400 480GB Builds (Compare 50,630 builds) See popular component choices, score breakdowns and rankings.
Gaming 49%
Desktop 81%
Aircraft carrier
Workstation 45%

Motherboard: Gigabyte B450M DS3H - $73

EDIT WITH CUSTOM PC BUILDER Value: 70% - Very good Total price: $603

Popular A400 480GB compatible motherboards:

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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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Solid State Drive Rankings (Price vs Performance) January 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.

Excellent (edit your comment) Add link

2 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.


7 months ago.

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


7 months ago.

i have the same freeze prolems its garbage


23 days 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


2 month 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.


2 months ago.

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


8 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.


5 days ago.

It's been reported to have lots of issues


1 month 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.


1 month 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.


12 months ago.

Worst drive i have ever owned, freezes frequenltly, unusable


15 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


20 months ago.

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


14 months ago.

needs DRAM as booting causes stutters on this one

1040 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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