Average Bench: 65.5% (660th of 1011)

Based on 795 user benchmarks.  Model: KingDian S400 120GB

Above average average bench

The Kingdian S400 120GB averaged 34.5% 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 27.6MB/s
Avg. 4K-64Thread Write Speed 208MB/s

Poor consistency

The range of scores (95th - 5th percentile) for the Kingdian S400 120GB is 66.9%. This is a particularly wide range which indicates that the Kingdian S400 120GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 143MB/s
Avg. Sequential Mixed IO Speed 249MB/s

Average Bench

(Based on 795 samples)
Min Avg Max
340 Read 439 507
66.6 Write 327 416
20.9 Mixed 249 407
49.9 SusWrite 143 375
64.4% 289 MB/s
Min Avg Max
14.8 4K Read 27.6 37.9
9.27 4K Write 56.9 108
1 4K Mixed 23.7 50.7
102% 36.1 MB/s
Min Avg Max
27.5 DQ Read 185 359
18 DQ Write 208 335
0.9 DQ Mixed 64.3 232
84.9% 152 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
48GB free (System drive)
Firmware: Q0720A
SusWrite @10s intervals: 304 144 152 156 154 72 MB/s
Read 372
Write 369
Mixed 332
SusWrite 164
70% 309 MB/s
4K Read 41.1
4K Write 72.9
4K Mixed 49.1
164% 54.4 MB/s
DQ Read 49.5
DQ Write 108
DQ Mixed 63.3
53% 73.5 MB/s
19GB free (System drive)
Firmware: SBFM21.1
SusWrite @10s intervals: 15 78 56 69 15 35 MB/s
Read 409
Write 272
Mixed 313
SusWrite 44.8
58% 260 MB/s
4K Read 29.3
4K Write 91.9
4K Mixed 26.8
127% 49.3 MB/s
DQ Read 200
DQ Write 99.6
DQ Mixed 11.5
45% 104 MB/s
795 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 19,849,350 SSDs tested.

Typical S400 120GB Builds (Compare 2,081 builds) See popular component choices, score breakdowns and rankings.
Gaming 12%
Tree trunk
Desktop 52%
Workstation 28%

Motherboard: Asrock B75 Pro3-M - $85

EDIT WITH CUSTOM PC BUILDER Value: 82% - Excellent Total price: $181

Popular S400 120GB 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) December 2019 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.


1011 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 $145Nvidia GTX 1660S (Super) $244Crucial MX500 250GB $39
Intel Core i5-9600K $200Nvidia RTX 2060 $324Samsung 850 Evo 120GB $150
Intel Core i7-9700K $360AMD RX 590 $180Samsung 860 Evo 250GB $54
Seagate Barracuda 1TB (2016) $32Corsair Vengeance LPX DDR4 3200 C16 2x8GB $76SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $38Corsair Vengeance LPX DDR4 3000 C15 2x8GB $58SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $613SanDisk Extreme 16GB $24
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