Average Bench: 60.7% (738th of 1021)

Based on 154,098 user benchmarks.  Models: KINGSTON SA400S37240G, KINGSTON SA400S37240, KINGSTON SA400S3, KINGSTON SA400S37240G, KINGSTON KINGSTON SA400S3

Above average average bench

The Kingston A400 240GB averaged 39.2% 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 Random Read Speed 26.3MB/s
Avg. 4K-64Thread Mixed IO Speed 78.2MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Kingston A400 240GB is 59.3%. This is a relatively wide range which indicates that the Kingston A400 240GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 145MB/s
Avg. Sequential Mixed IO Speed 252MB/s

Average Bench

(Based on 154,098 samples)
Min Avg Max
289 Read 420 510
94.1 Write 303 446
14.8 Mixed 252 426
51.9 SusWrite 145 388
62.4% 280 MB/s
Min Avg Max
12.4 4K Read 26.3 35.1
6.52 4K Write 52.3 106
0.4 4K Mixed 19.2 38.5
92.2% 32.6 MB/s
Min Avg Max
35.3 DQ Read 186 270
9.5 DQ Write 186 341
0.8 DQ Mixed 78.2 203
88.4% 150 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
220GB free
Firmware: R0105A
SusWrite @10s intervals: 416 140 153 48 111 112 MB/s
Read 497
Write 445
Mixed 416
SusWrite 163
85% 380 MB/s
4K Read 32.5
4K Write 110
4K Mixed 29.4
145% 57.3 MB/s
DQ Read 226
DQ Write 324
DQ Mixed 47.8
100% 199 MB/s
189GB free (System drive)
Firmware: SBFKB1E1
SusWrite @10s intervals: 248 185 207 197 203 229 MB/s
Read 255
Write 199
Mixed 308
SusWrite 212
55% 243 MB/s
4K Read 21.7
4K Write 41
4K Mixed 25.3
87% 29.3 MB/s
DQ Read 212
DQ Write 247
DQ Mixed 189
154% 216 MB/s
21GB free (System drive)
Firmware: SBFK61K1
SusWrite @10s intervals: 186 115 66 86 49 25 MB/s
Read 475
Write 333
Mixed 327
SusWrite 87.7
68% 306 MB/s
4K Read 29.6
4K Write 42.2
4K Mixed 1
68% 24.3 MB/s
DQ Read 198
DQ Write 18
DQ Mixed 56.8
54% 90.8 MB/s
62GB free (System drive)
Firmware: R0105A
SusWrite @10s intervals: 164 171 67 32 33 75 MB/s
Read 450
Write 408
Mixed 17
SusWrite 90.3
53% 241 MB/s
4K Read 22.1
4K Write 8.4
4K Mixed 0.4
38% 10.3 MB/s
DQ Read 114
DQ Write 326
DQ Mixed 1.2
64% 147 MB/s
151GB free (System drive)
Firmware: R0105A
SusWrite @10s intervals: 312 70 8.9 79 64 11 MB/s
Read 494
Write 426
Mixed 12
SusWrite 90.7
56% 256 MB/s
4K Read 15.3
4K Write 5.8
4K Mixed 0.3
27% 7.13 MB/s
154,098 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 26,403,600 SSDs tested.


Approx. $50 @ launch in Jan '17
OutletPCUS $324 months
EbayUS $3823 mins
AmazonUS $4017 mins
Send price feedback
Typical A400 240GB Builds (Compare 40,682 builds) See popular component choices, score breakdowns and rankings.
Gaming 56%
Desktop 67%
Battle cruiser
Workstation 60%

Motherboard: Gigabyte B450M DS3H - $73

EDIT WITH CUSTOM PC BUILDER Value: 84% - Excellent Total price: $494

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.

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) May 2020 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 2 years ago.

Excellent (edit your comment) Add link

8 days ago.

Very good, fast and use it as a boot drive and for drivers on extra space.

Info  graphicscardhub.com/...

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


24 days ago.

Tested both, this one was way better


6 months ago.

Great physical size in cases fits just about anywhere cheap fast for price and good capacity. Would recommend.


11 months ago.

Has a freezing problem and needs firmware updates.


5 months ago.

could have used some DRAM, stutters when booting.


15 months ago.

Cheap price, fast read/write speeds, trusted brand name... whats not to like?


6 months ago.

Affordable and reliable!


4 months ago.

Quite slow speeds compared to it's other slightly more expensive competition. I can't recommend it. You get what you pay for I suppose.

1021 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 i5-9400F $165Nvidia GTX 1660S (Super) $230Crucial MX500 250GB $49
Intel Core i5-9600K $199Nvidia GTX 1650S (Super) $160Samsung 850 Evo 120GB $78
Intel Core i7-9700K $370Nvidia RTX 2070S (Super) $500Samsung 860 Evo 250GB $56
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3200 C16 2x8GB $75SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $75SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $681SanDisk Ultra Fit 32GB $16
Today's hottest deals
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer Feedback