Average Bench: 67.3% (533rd of 956)

Based on 10,637 user benchmarks.  Models: KINGSTON SA400S37240G, KINGSTON SA400S37240, KINGSTON SA400S3, KINGSTON SA400S37240G, KINGSTON KINGSTON SA400S3

Above average average bench

The Kingston A400 240GB averaged 32.7% 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 132MB/s
Avg. 4K Random Read Speed 26.6MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Kingston A400 240GB is 45.2%. This is a relatively wide range which indicates that the Kingston A400 240GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 144MB/s
Avg. Sequential Write Speed 234MB/s

Average Bench

(Based on 10,637 samples)
Min Avg Max
225 Read 383 487
96.5 Write 234 422
87 Mixed 275 370
45.3 SusWrite 144 240
57.7% 259 MB/s
Min Avg Max
14.6 4K Read 26.6 36.3
17 4K Write 65.8 99.8
7.22 4K Mixed 27.3 40.8
110% 39.9 MB/s
Min Avg Max
29.4 DQ Read 204 287
19.2 DQ Write 233 334
16.8 DQ Mixed 132 212
123% 190 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
204GB free (System drive)
Firmware: SBFK
SusWrite @10s intervals: 278 214 200 185 191 194 MB/s
Read 384
Write 409
Mixed 349
SusWrite 210
76% 338 MB/s
4K Read 27.7
4K Write 82.6
4K Mixed 33.4
128% 47.9 MB/s
DQ Read 211
DQ Write 247
DQ Mixed 181
150% 213 MB/s
150GB free (System drive)
Firmware: SBFKB1D1
SusWrite @10s intervals: 201 178 185 146 156 198 MB/s
Read 307
Write 154
Mixed 311
SusWrite 177
53% 237 MB/s
4K Read 24.2
4K Write 58.1
4K Mixed 31.6
108% 38 MB/s
DQ Read 234
DQ Write 288
DQ Mixed 197
167% 240 MB/s
10,637 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 8,593,252 SSDs tested.


Approx. $50 @ launch in Jan '17
EbayUS $4620 mins
NeweggUS $464 days
AmazonUS $4615 mins
OutletPCUS $543 days
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Typical A400 240GB Builds (Compare 17,823 builds) See popular component choices, score breakdowns and rankings.
Gaming 68%
Battle cruiser
Desktop 67%
Battle cruiser
Workstation 63%

Motherboard: Asus PRIME B350-PLUS - $85

EDIT WITH CUSTOM PC BUILDER Value: 93% - Outstanding Total price: $698

Popular A400 240GB 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.

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How it works

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  • - 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.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
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  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) September 2018 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

Dramatically improves the responsiveness of your system...

Added 6 months ago.

Excellent (edit your comment) Add link

1 month ago.

Info  graphicscardhub.com/...

Recently got this SSD for my laptop and getting around 400 MB/s read and write speeds.


3 days ago.


956 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 i7-8700K $370Nvidia GTX 1070 $344Samsung 850 Evo 250GB $84
AMD Ryzen 5 1600 $150Nvidia GTX 1060-6GB $270Samsung 850 Evo 500GB $115
Intel Core i5-8600K $249AMD RX 480 $280Samsung 850 Pro 256GB $134
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3000 C15 2x8GB $147SanDisk Extreme 64GB $80
Seagate Barracuda 3TB (2016) $78G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $30
WD Blue 1TB (2012) $38Corsair Vengeance LPX DDR4 3200 C16 2x8GB $167SanDisk Ultra Fit 32GB $11
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