Average Bench: 84.9% (132nd of 862)

Based on 857 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 15.0% 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 Random Write Speed 86.9MB/s
Avg. 4K Random Read Speed 26.5MB/s

Average consistency

The range of scores (95th - 5th percentile) for the Crucial M550 128GB is 41.1%. This is a relatively wide range which indicates that the Crucial M550 128GB performs inconsistently under varying real world conditions.


Avg. 4K-64Thread Mixed IO Speed 42MB/s
Avg. 4K-64Thread Read Speed 177MB/s

Average Bench

(Based on 857 samples)
Min Avg Max
346 Read 498 525
316 Write 341 353
245 Mixed 391 416
90.9% 410 MB/s
Min Avg Max
18.8 4K Read 26.5 32.6
42.7 4K Write 86.9 126
14.6 4K Mixed 26.3 36.2
120% 46.6 MB/s
Min Avg Max
22.3 DQ Read 177 374
53.6 DQ Write 194 317
14.2 DQ Mixed 42 66.4
71.3% 138 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
14GB free
Firmware: MU01 Max speed: SATA 3.0 600 MB/s
Read 512
Write 347
Mixed 257
82% 372 MB/s
4K Read 22.8
4K Write 95.2
4K Mixed 32.6
127% 50.2 MB/s
DQ Read 281
DQ Write 280
DQ Mixed 46.3
99% 202 MB/s
60GB free
Firmware: MU02 Max speed: SATA 3.0 600 MB/s
Read 520
Write 350
Mixed 407
94% 425 MB/s
4K Read 28.8
4K Write 89
4K Mixed 27
125% 48.3 MB/s
DQ Read 28.9
DQ Write 214
DQ Mixed 18.9
45% 87.1 MB/s
99GB free
Firmware: DL03 Max speed: SATA 3.0 600 MB/s
Read 499
Write 335
Mixed 402
91% 412 MB/s
4K Read 21.4
4K Write 64.9
4K Mixed 24.3
98% 36.9 MB/s
DQ Read 174
DQ Write 181
DQ Mixed 41.4
69% 132 MB/s
83GB free
Firmware: MU01 Max speed: SATA 3.0 600 MB/s
Read 513
Write 348
Mixed 408
94% 423 MB/s
4K Read 27.6
4K Write 79.4
4K Mixed 18.5
108% 41.8 MB/s
DQ Read 27.7
DQ Write 178
DQ Mixed 18.3
39% 74.7 MB/s
857 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 4,465,714 SSDs tested.


AmazonUS $157.772 days ago.
Send price feedback
Typical M550 128GB Builds (Compare 2,955 builds) See popular component choices, score breakdowns and rankings.
Gaming 56%
Desktop 53%
Workstation 44%
Speed boat

Motherboard: Asus M5A99X EVO R2.0 - $206

EDIT WITH CUSTOM PC BUILDER Value: 62% - Good Total price: $860

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 (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) November 2017 SSD Rankings.

Welcome to our consumer SSD comparison. We calculate effective speed based on real world performance then adjust by cost per GB to yield a value for money rating. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top SSDs. Share your opinion by voting. [SSDrivePro]


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

Do more, faster longer...

Added 2 years ago.

862 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 i7-7700K $288Nvidia GTX 1070 $410Samsung 850 Evo 250GB $85
AMD Ryzen 7 1700 $270AMD RX 480 $240Samsung 850 Pro 256GB $110
Intel Core i5-7600K $200Nvidia GTX 1060-6GB $240Samsung 850 Evo 500GB $150
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $160SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $54Corsair Vengeance LPX DDR4 3200 C16 2x8GB $170SanDisk Ultra Fit 32GB $12
Today's hottest deals
User Guide  •  About  •  FAQs  •  @Email  •  Privacy  •  Developer Feedback