Average Bench: 74.7% (563rd of 1058)

more Based on 180,679 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 25.3% 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 112MB/s
Avg. 4K Random Read Speed 26.4MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Kingston A400 480GB is 62%. This is a particularly wide range which indicates that the Kingston A400 480GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 282MB/s
Avg. Sequential Mixed IO Speed 283MB/s

Average Bench

(Based on 180,679 samples)
Min Avg Max
193 Read 399 509
34.1 Write 299 451
31.3 Mixed 283 406
78.7 SusWrite 282 458
70.8% 316 MB/s
Min Avg Max
14.4 4K Read 26.4 35.6
12.4 4K Write 63.4 109
6.18 4K Mixed 25.9 42.4
107% 38.6 MB/s
Min Avg Max
18.6 DQ Read 185 274
15.2 DQ Write 234 353
8.02 DQ Mixed 112 216
112% 177 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
284GB free (System drive)
Firmware: SBFKK1B3
SusWrite @10s intervals: 451 457 454 456 464 470 MB/s
Read 418
Write 458
Mixed 353
SusWrite 458
95% 422 MB/s
4K Read 32.7
4K Write 96.4
4K Mixed 39.7
151% 56.3 MB/s
DQ Read 219
DQ Write 356
DQ Mixed 171
162% 249 MB/s
144GB free (System drive)
Firmware: SBFKK1B3
SusWrite @10s intervals: 359 429 411 424 436 440 MB/s
Read 413
Write 128
Mixed 340
SusWrite 416
73% 324 MB/s
4K Read 24.9
4K Write 51.5
4K Mixed 29.3
102% 35.2 MB/s
DQ Read 218
DQ Write 335
DQ Mixed 170
158% 241 MB/s
82GB free
Firmware: SBFKK1B3
SusWrite @10s intervals: 396 421 434 426 164 27 MB/s
Read 383
Write 360
Mixed 354
SusWrite 311
79% 352 MB/s
4K Read 25.2
4K Write 66.5
4K Mixed 30.9
113% 40.9 MB/s
DQ Read 31.5
DQ Write 87.9
DQ Mixed 37.2
35% 52.2 MB/s
178GB free (System drive)
Firmware: SBFKK1B3
SusWrite @10s intervals: 312 332 335 333 335 331 MB/s
Read 324
Write 325
Mixed 291
SusWrite 330
72% 318 MB/s
4K Read 23.9
4K Write 43.6
4K Mixed 27.4
94% 31.6 MB/s
DQ Read 184
DQ Write 206
DQ Mixed 142
121% 177 MB/s
65GB free (System drive)
Firmware: SBFK61E1
SusWrite @10s intervals: 180 30 25 25 63 17 MB/s
Read 347
Write 317
Mixed 299
SusWrite 56.6
57% 255 MB/s
4K Read 34.2
4K Write 73.7
4K Mixed 37.5
139% 48.5 MB/s
DQ Read 296
DQ Write 188
DQ Mixed 19.8
75% 168 MB/s
431GB free
Firmware: S3401103
SusWrite @10s intervals: 206 207 206 207 206 206 MB/s
Read 365
Write 358
Mixed 331
SusWrite 206
71% 315 MB/s
4K Read 23
4K Write 55.6
4K Mixed 21.8
92% 33.5 MB/s
DQ Read 126
DQ Write 212
DQ Mixed 98.3
94% 146 MB/s
180,679 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 51,170,732 SSDs tested.


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Typical A400 480GB Builds (Compare 74,218 builds) See popular component choices, score breakdowns and rankings.
Gaming 47%
Desktop 81%
Aircraft carrier
Workstation 44%
Speed boat

Motherboard: Gigabyte B450M DS3H - $70

EDIT WITH CUSTOM PC BUILDER Value: 65% - Good Total price: $693

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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  • - 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) January 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.

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23 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


18 months ago.

i have the same freeze prolems its garbage


10 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


9 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.


14 months ago.

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


19 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 months ago.

It's been reported to have lots of issues


7 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.


13 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


5 days ago.

No problems for me. Works just fine as expected.


2 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


2 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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