Average Bench: 77.4% (516th of 1058)

more Based on 134,846 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 22.5% 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 125MB/s
Avg. 4K Random Read Speed 26.7MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Kingston A400 480GB is 61.5%. 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 287MB/s
Avg. Sequential Write Speed 302MB/s

Average Bench

(Based on 134,846 samples)
Min Avg Max
194 Read 394 506
25.6 Write 302 450
27.1 Mixed 287 402
85.5 SusWrite 304 465
72.2% 322 MB/s
Min Avg Max
14 4K Read 26.7 34.8
11.6 4K Write 65.5 108
6.7 4K Mixed 27.4 42.6
110% 39.9 MB/s
Min Avg Max
29.2 DQ Read 190 272
14.6 DQ Write 249 356
14.4 DQ Mixed 125 216
121% 188 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
181GB free
Firmware: SBFKK1B3
SusWrite @10s intervals: 464 466 471 470 470 469 MB/s
Read 421
Write 254
Mixed 384
SusWrite 468
86% 382 MB/s
4K Read 30.5
4K Write 83.7
4K Mixed 36.5
137% 50.2 MB/s
DQ Read 194
DQ Write 360
DQ Mixed 169
159% 241 MB/s
289GB free
Firmware: S3401103
SusWrite @10s intervals: 450 447 450 453 453 454 MB/s
Read 515
Write 449
Mixed 385
SusWrite 451
101% 450 MB/s
4K Read 27.2
4K Write 27.1
4K Mixed 16.4
77% 23.6 MB/s
DQ Read 72.3
DQ Write 28.4
DQ Mixed 32.1
29% 44.3 MB/s
374GB free (System drive)
Firmware: SBFKB1C2
SusWrite @10s intervals: 260 49 44 59 44 60 MB/s
Read 248
Write 101
Mixed 286
SusWrite 85.8
40% 180 MB/s
4K Read 24.7
4K Write 78
4K Mixed 35.3
124% 46 MB/s
DQ Read 205
DQ Write 314
DQ Mixed 173
155% 230 MB/s
134,846 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 41,716,230 SSDs tested.


AmazonUS $4922 mins
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Typical A400 480GB Builds (Compare 57,213 builds) See popular component choices, score breakdowns and rankings.
Gaming 48%
Desktop 81%
Aircraft carrier
Workstation 44%
Speed boat

Motherboard: Gigabyte B450M DS3H - $70

EDIT WITH CUSTOM PC BUILDER Value: 69% - Good Total price: $603

Popular A400 480GB compatible motherboards:

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Solid State Drive Rankings (Price vs Performance) April 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

4 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


9 months ago.

i have the same freeze prolems its garbage


1 month 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 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.


4 months ago.

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


10 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.


2 months 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.


3 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.


15 months ago.

Worst drive i have ever owned, freezes frequenltly, unusable


17 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


22 months ago.

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


16 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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