Average Bench: 85.6% (382nd of 1058)

Based on 2,514 user benchmarks.  Models: Crucial_CT128M550SSD1, Micron_M550_2.5"_7mm_128GB, Crucial_ CT128M550SSD1, Crucial_CT128M55

Very good average bench

The Crucial M550 128GB averaged just 14.4% lower than the peak scores attained by the group leaders. This is an excellent result which ranks the Crucial M550 128GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 171MB/s
Avg. 4K Random Mixed IO Speed 36.8MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Crucial M550 128GB is 47.1%. This is a relatively wide range which indicates that the Crucial M550 128GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 258MB/s
Avg. Sequential Mixed IO Speed 287MB/s

Average Bench

(Based on 2,514 samples)
Min Avg Max
297 Read 416 467
227 Write 332 355
230 Mixed 287 321
128 SusWrite 258 351
72.3% 323 MB/s
Min Avg Max
18 4K Read 26.5 31.5
39.9 4K Write 82.1 117
23.4 4K Mixed 36.8 45.1
131% 48.4 MB/s
Min Avg Max
31.7 DQ Read 306 381
92.3 DQ Write 268 329
44.4 DQ Mixed 171 223
160% 248 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
34GB free (System drive)
Firmware: MU01
SusWrite @10s intervals: 242 153 153 160 148 129 MB/s
Read 444
Write 358
Mixed 306
SusWrite 164
71% 318 MB/s
4K Read 31
4K Write 98.1
4K Mixed 43.1
154% 57.4 MB/s
DQ Read 375
DQ Write 287
DQ Mixed 188
180% 283 MB/s
48GB free (System drive)
Firmware: MU01
SusWrite @10s intervals: 220 180 199 200 191 194 MB/s
Read 456
Write 351
Mixed 320
SusWrite 197
74% 331 MB/s
4K Read 28.6
4K Write 78.4
4K Mixed 38.9
135% 48.6 MB/s
DQ Read 354
DQ Write 325
DQ Mixed 187
182% 289 MB/s
2,514 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 49,496,469 SSDs tested.


MSRP ≈ $110 @ launch in Mar '14
AmazonUS $1001 month
Send price feedback
Typical M550 128GB Builds (Compare 16,100 builds) See popular component choices, score breakdowns and rankings.
Gaming 24%
Desktop 71%
Workstation 21%

Motherboard: Gigabyte GA-970A-DS3P - $149

EDIT WITH CUSTOM PC BUILDER Value: 48% - Average Total price: $534

Popular M550 128GB 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.
  • - 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) December 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.


Controller: Marvell 88SS9189. Flash Memory: Micron Synchronous 20nm MLC

Do more, faster longer...

Added 6 years ago.

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 i5-12600K $300Nvidia RTX 3060-Ti $400Crucial MX500 250GB $45
Intel Core i5-11600K $220Nvidia RTX 3070 $500Samsung 860 Evo 250GB $52
Intel Core i7-11700K $315Nvidia GTX 1660S (Super) $240Samsung 850 Evo 120GB $183
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $67SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $37Corsair Vengeance LPX DDR4 3000 C15 2x8GB $74SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $71G.SKILL Trident Z DDR4 3200 C14 4x16GB $649SanDisk Ultra Fit 32GB $16
Today's hottest deals
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer  •  YouTube Feedback