Average Bench: 64.1% (647th of 992)

Based on 520 user benchmarks.  Model: SanDisk X400 2.5 7MM 128GB

Above average average bench

The Sandisk X400 2.5 7MM 128GB averaged 35.9% 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-64Thread Mixed IO Speed 86.4MB/s
Avg. 4K Random Read Speed 23.4MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the Sandisk X400 2.5 7MM 128GB is 39.5%. This is a relatively wide range which indicates that the Sandisk X400 2.5 7MM 128GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 85.1MB/s
Avg. Sequential Write Speed 214MB/s

Average Bench

(Based on 520 samples)
Min Avg Max
345 Read 451 501
92.2 Write 214 326
132 Mixed 258 392
40.3 SusWrite 85.1 112
55.7% 252 MB/s
Min Avg Max
10.2 4K Read 23.4 35
18.6 4K Write 51 91.9
8.33 4K Mixed 21.7 38.4
90.2% 32 MB/s
Min Avg Max
18 DQ Read 214 361
36.8 DQ Write 173 261
8.65 DQ Mixed 86.4 224
93.8% 158 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
85GB free (System drive)
Firmware: X4152012
SusWrite @10s intervals: 110 99 101 89 95 95 MB/s
Read 494
Write 207
Mixed 192
SusWrite 98.2
54% 248 MB/s
4K Read 36.3
4K Write 86
4K Mixed 42.5
155% 54.9 MB/s
DQ Read 330
DQ Write 224
DQ Mixed 192
166% 249 MB/s
20GB free
Firmware: X4130012
SusWrite @10s intervals: 181 102 101 100 103 100 MB/s
Read 439
Write 316
Mixed 315
SusWrite 114
66% 296 MB/s
4K Read 30.3
4K Write 59.1
4K Mixed 35.8
123% 41.7 MB/s
DQ Read 338
DQ Write 266
DQ Mixed 229
191% 277 MB/s
520 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 12,966,448 SSDs tested.

Typical X400 2.5 7MM 128GB Builds (Compare 1,507 builds) See popular component choices, score breakdowns and rankings.
Gaming 17%
Desktop 55%
Workstation 32%
Sail boat

System: Dell Inspiron 3668

EDIT WITH CUSTOM PC BUILDER Value: 80% - Very good Total price: $200

Popular X400 2.5 7MM 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.

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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.
  • - 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.
  • - Share your opinion by voting.
Solid State Drive Rankings (Price vs Performance) March 2019 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.


992 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 $370Nvidia GTX 1070 $364Samsung 850 Evo 250GB $75
AMD Ryzen 5 1600 $120Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $105
Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $97
Seagate Barracuda 1TB (2016) $43Corsair Vengeance LPX DDR4 3000 C15 2x8GB $105SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $761SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $110SanDisk Ultra Fit 32GB $12
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