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Kingston SKC400S37/256G

SSDNow KC400 256GB

▲ 5114 ▼

Release date ≈ Q1 2016.

Average Bench: 84.5% (413th of 1072)

Based on 2,939 user benchmarks.  Models: KINGSTON SKC400S37256G, KINGSTON SKC400S37256G, KINGSTON SKC400S37512G, KINGSTON KINGSTON SKC400S, KINGSTON SKC400S
Poor: 55%Average: 84.5% Great: 110%

Popular builds with this SSD

Very good average bench

The Kingston SSDNow KC400 256GB averaged just 15.4% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Kingston SSDNow KC400 256GB near the top of the comparison list.

Strengths

Avg. 4K-64Thread Write Speed 272MB/s
Avg. 4K Random Mixed IO Speed 31.7MB/s

Below average consistency

The range of scores (95th - 5th percentile) for the Kingston SSDNow KC400 256GB is 54.7%. This is a relatively wide range which indicates that the Kingston SSDNow KC400 256GB performs inconsistently under varying real world conditions.

Weaknesses

Avg. Sequential Mixed IO Speed 288MB/s
Avg. Sustained Write Speed 303MB/s
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Average Bench

(Based on 2,939 samples)
Rank 41384.5%
Min Avg Max
217 Read 430 508
80.4 Write 376 494
132 Mixed 288 332
116 SusWrite 303 469
78.4% 349 MB/s
Min Avg Max
11.2 4K Read 24.6 31.6
30 4K Write 73.1 111
13.9 4K Mixed 31.7 41.6
116% 43.1 MB/s
Min Avg Max
171 DQ Read 319 361
67.6 DQ Write 272 373
21.3 DQ Mixed 62.2 69.8
110% 218 MB/s
User Benchmarks BenchSequentialRandom 4kDeep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
177GB free
Firmware: SAFM001B
SusWrite @10s intervals: 482 469 488 485 490 489 MB/s
109% Outstanding
Read 511
Write 488
Mixed 335
SusWrite 484
102% 454 MB/s
4K Read 30.4
4K Write 86.9
4K Mixed 39.1
142% 52.1 MB/s
DQ Read 355
DQ Write 347
DQ Mixed 69
129% 257 MB/s
195GB free
Firmware: SAFM001B
SusWrite @10s intervals: 464 466 472 464 470 472 MB/s
101% Outstanding
Read 494
Write 469
Mixed 307
SusWrite 468
98% 435 MB/s
4K Read 27.5
4K Write 73.2
4K Mixed 35.4
126% 45.4 MB/s
DQ Read 343
DQ Write 284
DQ Mixed 66.7
117% 231 MB/s
201GB free (System drive)
Firmware: SAFM001A
SusWrite @10s intervals: 398 401 410 397 392 403 MB/s
95.5% Outstanding
Read 430
Write 414
Mixed 301
SusWrite 400
87% 386 MB/s
4K Read 26.2
4K Write 78.6
4K Mixed 36.4
128% 47.1 MB/s
DQ Read 342
DQ Write 298
DQ Mixed 68.7
120% 236 MB/s
155GB free
Firmware: SAFM001A
SusWrite @10s intervals: 331 428 356 405 461 458 MB/s
93.2% Outstanding
Read 483
Write 470
Mixed 321
SusWrite 407
94% 420 MB/s
4K Read 24.3
4K Write 62.7
4K Mixed 31.3
110% 39.4 MB/s
DQ Read 351
DQ Write 325
DQ Mixed 67.8
125% 248 MB/s
97GB free
Firmware: SAFM00.Y
SusWrite @10s intervals: 329 174 354 276 215 204 MB/s
91.3% Outstanding
Read 497
Write 475
Mixed 325
SusWrite 259
87% 389 MB/s
4K Read 28.4
4K Write 86.1
4K Mixed 36.5
135% 50.3 MB/s
DQ Read 307
DQ Write 324
DQ Mixed 68.2
120% 233 MB/s
50GB free (System drive)
Firmware: SAFM001B
SusWrite @10s intervals: 190 145 129 123 150 124 MB/s
73% Very good
Read 483
Write 223
Mixed 320
SusWrite 144
65% 292 MB/s
4K Read 26.4
4K Write 68.9
4K Mixed 33
119% 42.8 MB/s
DQ Read 346
DQ Write 25.7
DQ Mixed 68.2
79% 147 MB/s
64GB free (System drive)
Firmware: SAFM001B
SusWrite @10s intervals: 320 148 140 353 74 362 MB/s
69.8% Good
Read 395
Write 462
Mixed 296
SusWrite 233
78% 346 MB/s
4K Read 0
4K Write 60.7
4K Mixed 32.8
74% 31.2 MB/s
DQ Read 320
DQ Write 354
DQ Mixed 69
126% 248 MB/s
34GB free (System drive)
Firmware: SAFM00.Y
SusWrite @10s intervals: 118 100 75 125 75 101 MB/s
54.5% Above average
Read 374
Write 102
Mixed 239
SusWrite 99.3
45% 204 MB/s
4K Read 5.6
4K Write 64.2
4K Mixed 27.3
78% 32.4 MB/s
DQ Read 337
DQ Write 48.4
DQ Mixed 64.7
80% 150 MB/s
2,939 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 75,662,858 SSDs tested

 Prices

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EbayUS $3513 months
AmazonUS $1254 mins
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Custom PC Builder (Start a new build) Build your perfect PC: compare component prices, popularity, speed and value for money

CHOOSE A COMPONENT:

CPU GPU SSD HDD RAM MBD
Typical SSDNow KC400 256GB Builds (Compare 6,296 builds) See popular component choices, score breakdowns and rankings
Gaming
Gaming 9%
Tree trunk
Desktop
Desktop 61%
Destroyer
Workstation
Workstation 8%
Tree trunk

System: HP EliteDesk 800 G1 SFF

CPU
Core i5-4570Intel  $62Bench 62%, 129,272 samples1,889x
Core i5-4590Intel  $188Bench 63%, 151,366 samples1,601x
Core i7-4770Intel  $75Bench 70%, 176,321 samples884x
GPU
HD 4600 (Desktop 1.25 GHz)Intel  $15Bench 3%, 230,189 samples3,490x
GT 1030NvidiaBench 14%, 185,384 samples434x
GTX 1650Nvidia  $155Bench 43%, 259,091 samples421x
SSD
SSDNow KC400 256GBKingston  $35Bench 85%, 2,939 samples1x
RAM
2x8GBUnknownBench 64%, 236,291 samples92x
HMT451U6BFR8A-PB 2x4GBHynixBench 51%, 8,612 samples84x
8JTF51264AZ-1G6E1 2x4GBMicronBench 52%, 17,707 samples79x
EDIT WITH CUSTOM PC BUILDER Value: 66% - Good Total price: $112

Popular SSDNow KC400 256GB systems:

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

Welcome to our 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 value for money upgrades.

UserBenchmark of the month

Gaming Desktop ProGaming

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
  • - SkillBench (space shooter) tests user input accuracy
  • - 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
Solid State Drive Rankings (Price vs Performance) April 2024 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]

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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.

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 Frequently Asked Questions

Storage Devices FAQ
What is sustained sequential write speed?
What’s the difference between SLC, MLC and TLC?
What is 3D XPoint and how fast is it?
What’s the difference between SATA, PCIe and NVMe?
What’s the difference between NAND and V-NAND?
What is sequential write speed?
What is sequential read speed?
What is incompressible data?
What is queue depth?
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What is the SSD value for money rating?
What is 4K 64 thread write speed?
Can CPU power saving states (C1,C2,C3) impact SSD speed?
What is the effective SSD speed index?
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ALL FAQs »

 Best User Rated
The Best.
CPUGPUSSD
Intel Core i5-13600K $279Nvidia RTX 4060 $300Crucial MX500 250GB $40
Intel Core i5-12400F $134Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $184Nvidia RTX 4070 $409Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $30Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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