Average Bench: 67.6% (639th of 1017)

Based on 463 user benchmarks.  Models: SanDisk SD7SN3Q-128G-1006, SanDisk SD7UN3Q128G1022, SanDisk SD7SN3Q128G1002

Above average average bench

The SanDisk X300s SATA M.2 128GB averaged 32.3% 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 24.1MB/s
Avg. 4K-64Thread Mixed IO Speed 66.3MB/s

Above average consistency

The range of scores (95th - 5th percentile) for the SanDisk X300s SATA M.2 128GB is 39%. This is a relatively wide range which indicates that the SanDisk X300s SATA M.2 128GB performs inconsistently under varying real world conditions.


Avg. Sustained Write Speed 232MB/s
Avg. Sequential Write Speed 267MB/s

Average Bench

(Based on 463 samples)
Min Avg Max
356 Read 419 473
164 Write 267 324
184 Mixed 275 356
93.5 SusWrite 232 327
66.6% 298 MB/s
Min Avg Max
13.1 4K Read 24.1 31.7
22.6 4K Write 53.5 88.7
8.92 4K Mixed 20 33.8
90.5% 32.6 MB/s
Min Avg Max
21.5 DQ Read 194 318
48.1 DQ Write 183 290
9.04 DQ Mixed 66.3 146
83.4% 148 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
28GB free (System drive)
Firmware: X2170002
SusWrite @10s intervals: 293 234 158 106 64 84 MB/s
Read 481
Write 308
Mixed 246
SusWrite 156
66% 298 MB/s
4K Read 30.2
4K Write 73.7
4K Mixed 34.8
129% 46.2 MB/s
DQ Read 322
DQ Write 266
DQ Mixed 148
151% 245 MB/s
63GB free (System drive)
Firmware: X2170002
SusWrite @10s intervals: 283 232 233 227 223 222 MB/s
Read 450
Write 316
Mixed 235
SusWrite 237
69% 310 MB/s
4K Read 24.9
4K Write 49
4K Mixed 26.5
98% 33.5 MB/s
DQ Read 235
DQ Write 228
DQ Mixed 147
134% 203 MB/s
29GB free (System drive)
Firmware: X2170002
SusWrite @10s intervals: 108 80 83 74 39 46 MB/s
Read 313
Write 207
Mixed 184
SusWrite 71.6
43% 194 MB/s
4K Read 29.7
4K Write 70.5
4K Mixed 33.6
125% 44.6 MB/s
DQ Read 320
DQ Write 173
DQ Mixed 138
132% 211 MB/s
463 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 22,661,130 SSDs tested.

Typical X300s SATA M.2 128GB Builds (Compare 654 builds) See popular component choices, score breakdowns and rankings.
Gaming 12%
Tree trunk
Desktop 31%
Sail boat
Workstation 18%

System: Asus UX305FA


Popular X300s SATA M.2 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.
  • - 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) February 2020 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.


1017 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 i5-9400F $150Nvidia GTX 1660S (Super) $230Crucial MX500 250GB $49
Intel Core i5-9600K $210Nvidia GTX 1650S (Super) $160Samsung 850 Evo 120GB $78
Intel Core i7-9700K $356AMD RX 590 $185Samsung 850 Pro 512GB $249
Seagate Barracuda 1TB (2016) $37Corsair Vengeance LPX DDR4 3200 C16 2x8GB $74SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $38Corsair Vengeance LPX DDR4 3000 C15 2x8GB $74SanDisk Extreme 32GB $46
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $683SanDisk Extreme 16GB $24
Today's hottest deals
About  •  User Guide  •  FAQs  •  Email  •  Privacy  •  Developer Feedback