Average Bench: 74.7% (313th of 921)

Based on 166 user benchmarks.  Models: KINGSTON SKC400S371T, KINGSTON KINGSTON SKC400S, KINGSTON SKC400S371T, KINGSTON SKC400S

Good average bench

The Kingston SSDNow KC400 1TB averaged 25.2% 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 23.6MB/s
Avg. Sequential Read Speed 501MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Kingston SSDNow KC400 1TB is 30.4%. This is a relatively narrow range which indicates that the Kingston SSDNow KC400 1TB performs reasonably consistently under varying real world conditions.


Avg. 4K-64Thread Mixed IO Speed 10.7MB/s
Avg. 4K Random Mixed IO Speed 10.3MB/s

Average Bench

(Based on 166 samples)
Min Avg Max
485 Read 501 524
299 Write 387 416
272 Mixed 394 424
95% 427 MB/s
Min Avg Max
15.4 4K Read 23.6 30.4
23.6 4K Write 59.4 96.1
7.81 4K Mixed 10.3 11.5
80.3% 31.1 MB/s
Min Avg Max
17.8 DQ Read 181 327
43.9 DQ Write 187 285
7.55 DQ Mixed 10.7 12.2
55.8% 126 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
926GB free
Firmware: SAFM001A Max speed: SATA 3.0 600 MB/s
Read 515
Write 410
Mixed 418
100% 448 MB/s
4K Read 27.8
4K Write 92.7
4K Mixed 11.2
106% 43.9 MB/s
DQ Read 325
DQ Write 283
DQ Mixed 11.4
88% 206 MB/s
204GB free
Firmware: SAFM001B Max speed: SATA 3.0 600 MB/s
Read 521
Write 386
Mixed 419
98% 442 MB/s
4K Read 28.5
4K Write 69.3
4K Mixed 11.2
94% 36.3 MB/s
DQ Read 275
DQ Write 232
DQ Mixed 11.1
74% 172 MB/s
804GB free
Firmware: SAFM00.W Max speed: SATA 3.0 600 MB/s
Read 500
Write 378
Mixed 385
94% 421 MB/s
4K Read 21.3
4K Write 51.2
4K Mixed 6.99
68% 26.5 MB/s
DQ Read 236
DQ Write 138
DQ Mixed 11.3
56% 129 MB/s
166 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 6,469,847 SSDs tested.


EbayUS $3223 mins
AmazonUS $4868 days
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Typical SSDNow KC400 1TB Builds (Compare 108 builds) See popular component choices, score breakdowns and rankings.
Gaming 89%
Aircraft carrier
Desktop 68%
Battle cruiser
Workstation 106%

System: Asus Z10PA-D8 Series

EDIT WITH CUSTOM PC BUILDER Value: 87% - Excellent Total price: $770

Popular SSDNow KC400 1TB systems:

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 (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - 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 highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) April 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 - Sometimes benchmarks get it completely wrong...
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
  • Details ordered by value - Detailed performance stats ordered by overall value for money.


921 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 $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $90
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $290Samsung 850 Evo 500GB $137
AMD Ryzen 5 1600 $176AMD RX 480 $350Samsung 850 Pro 256GB $163
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $183SanDisk Extreme 64GB $70
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $957SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $193SanDisk Extreme 16GB $18
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