Average Bench: 74.6% (565th of 1058)

more Based on 156,295 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 25.4% 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 118MB/s
Avg. 4K Random Read Speed 26.4MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Kingston A400 480GB is 62.9%. 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 279MB/s
Avg. 4K-64Thread Read Speed 180MB/s

Average Bench

(Based on 156,295 samples)
Min Avg Max
173 Read 384 509
23.8 Write 291 448
24 Mixed 279 401
72.9 SusWrite 291 461
69.8% 311 MB/s
Min Avg Max
13.7 4K Read 26.4 34.4
11.2 4K Write 63.2 105
3.74 4K Mixed 26.2 40.7
107% 38.6 MB/s
Min Avg Max
14.8 DQ Read 180 269
12.9 DQ Write 233 353
11.8 DQ Mixed 118 215
114% 177 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
243GB free
Firmware: SBFKK1B3
SusWrite @10s intervals: 347 466 469 472 472 471 MB/s
Read 379
Write 462
Mixed 347
SusWrite 449
93% 409 MB/s
4K Read 33.1
4K Write 96.5
4K Mixed 40
152% 56.5 MB/s
DQ Read 218
DQ Write 345
DQ Mixed 171
161% 245 MB/s
333GB free (System drive)
Firmware: S3501103
SusWrite @10s intervals: 28 404 405 373 352 355 MB/s
Read 457
Write 366
Mixed 348
SusWrite 319
84% 373 MB/s
4K Read 13.1
4K Write 12
4K Mixed 7.7
36% 10.9 MB/s
DQ Read 154
DQ Write 18.4
DQ Mixed 31
37% 67.8 MB/s
181GB free (System drive)
Firmware: S3401103
SusWrite @10s intervals: 25 393 93 26 27 37 MB/s
Read 474
Write 424
Mixed 398
SusWrite 100
78% 349 MB/s
4K Read 25.2
4K Write 20.2
4K Mixed 12.8
65% 19.4 MB/s
DQ Read 137
DQ Write 25.9
DQ Mixed 35.3
38% 66.2 MB/s
156,295 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 44,171,174 SSDs tested.


AmazonUS $5517 mins
EbayUS $5524 mins
Send price feedback
Typical A400 480GB Builds (Compare 61,654 builds) See popular component choices, score breakdowns and rankings.
Gaming 47%
Desktop 81%
Aircraft carrier
Workstation 44%
Speed boat

Motherboard: Gigabyte B450M DS3H - $69

EDIT WITH CUSTOM PC BUILDER Value: 69% - Good Total price: $606

Popular A400 480GB compatible motherboards:

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

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) June 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

1 month 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.


12 months ago.

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


11 months ago.

i have the same freeze prolems its garbage


3 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


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.


7 months ago.

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


12 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


14 days 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.


6 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.


17 months ago.

Worst drive i have ever owned, freezes frequenltly, unusable


20 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


18 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.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i5-11400F $220Nvidia RTX 3070 $500Crucial MX500 250GB $45
Intel Core i5-11600K $259Nvidia RTX 3060-Ti $400Samsung 850 Evo 120GB $78
Intel Core i7-10700K $277Nvidia RTX 3080 $700Samsung 860 Evo 250GB $52
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $35Corsair Vengeance LPX DDR4 3000 C15 2x8GB $94SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
Today's hottest deals
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer  •  YouTube Feedback