Average Bench: 54.8% (839th of 1058)

more Based on 8,871 user benchmarks.  Models: C400-MTFDDAK128MAM, C400-MTFDDAK128M, Micron C400 RealSSD 2.5" 7mm 128GB, MTFDDAK128MAM-1J1, C400-MTFDDAA128MAM, MTFDDAK1 MTFDDAK128MAM-1J, C400-MTFDDAC128MAM, MTFDDAK128MAM-1J

Average average bench

The Micron C400 RealSSD 128GB averaged 45.1% 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 22.8MB/s
Avg. 4K Random Write Speed 62MB/s

Good consistency

The range of scores (95th - 5th percentile) for the Micron C400 RealSSD 128GB is 27.4%. This is a relatively narrow range which indicates that the Micron C400 RealSSD 128GB performs reasonably consistently under varying real world conditions.


Avg. Sustained Write Speed 139MB/s
Avg. Sequential Write Speed 164MB/s

Average Bench

(Based on 8,871 samples)
Min Avg Max
328 Read 393 439
28.2 Write 164 191
55.6 Mixed 197 228
27.6 SusWrite 139 188
49.3% 223 MB/s
Min Avg Max
15.1 4K Read 22.8 29
27.1 4K Write 62 101
9.9 4K Mixed 14.6 18.2
86% 33.1 MB/s
Min Avg Max
28.1 DQ Read 143 288
28.3 DQ Write 106 170
16.9 DQ Mixed 38.5 58.2
52.1% 95.9 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
37GB free (System drive)
Firmware: 040H
SusWrite @10s intervals: 141 151 158 157 164 147 MB/s
Read 343
Write 132
Mixed 195
SusWrite 153
46% 206 MB/s
4K Read 24
4K Write 85
4K Mixed 13.1
98% 40.7 MB/s
DQ Read 125
DQ Write 106
DQ Mixed 29.4
46% 86.9 MB/s
37GB free (System drive)
Firmware: 070H
SusWrite @10s intervals: 160 130 125 135 105 106 MB/s
Read 400
Write 182
Mixed 214
SusWrite 127
51% 231 MB/s
4K Read 27.1
4K Write 69.6
4K Mixed 14.2
96% 37 MB/s
DQ Read 105
DQ Write 103
DQ Mixed 27.4
42% 78.5 MB/s
69GB free (System drive)
Firmware: 070H
SusWrite @10s intervals: 145 168 143 165 149 157 MB/s
Read 389
Write 161
Mixed 196
SusWrite 155
50% 225 MB/s
4K Read 22
4K Write 73.2
4K Mixed 11.5
87% 35.6 MB/s
DQ Read 122
DQ Write 105
DQ Mixed 29.2
45% 85.6 MB/s
8,871 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 45,261,108 SSDs tested.

Typical C400 RealSSD 128GB Builds (Compare 7,121 builds) See popular component choices, score breakdowns and rankings.
Gaming 44%
Speed boat
Desktop 77%
Workstation 37%
Jet ski

System: HP Z420 Workstation

EDIT WITH CUSTOM PC BUILDER Value: 64% - Good Total price: $565

Popular C400 RealSSD 128GB 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.
  • - 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) July 2021 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.


1058 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 i5-11400F $239Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11600K $270Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-11700K $380Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $78
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $79SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $34Corsair Vengeance LPX DDR4 3000 C15 2x8GB $85SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
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