Average Bench: 151% (116th of 1016)

Based on 533 user benchmarks.  Model: APPLE SSD SM0256G

Outstanding average bench

The Apple SM0256G PCIe 251GB averaged 50.9% higher than the peak scores attained by the group leaders. This is an excellent result which ranks the Apple SM0256G PCIe 251GB near the top of the comparison list.


Avg. 4K-64Thread Mixed IO Speed 367MB/s
Avg. Sequential Read Speed 1,253MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Apple SM0256G PCIe 251GB is 97.1%. This is a particularly wide range which indicates that the Apple SM0256G PCIe 251GB performs inconsistently under varying real world conditions.


Avg. 4K Random Write Speed 68.9MB/s
Avg. 4K Random Mixed IO Speed 29.2MB/s

Average Bench

(Based on 533 samples)
Min Avg Max
689 Read 1,253 1,776
455 Write 878 1,205
404 Mixed 698 1,264
361 SusWrite 770 1,206
201% 900 MB/s
Min Avg Max
14.9 4K Read 29.8 42.5
22.4 4K Write 68.9 118
10.4 4K Mixed 29.2 50.2
119% 42.7 MB/s
Min Avg Max
19.4 DQ Read 443 631
65.4 DQ Write 299 396
13 DQ Mixed 367 516
275% 369 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
68GB free (System drive)
Firmware: BXW1JA0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 895 900 1004 1028 1040 1040 MB/s
Read 1,296
Write 995
Mixed 648
SusWrite 984
220% 981 MB/s
4K Read 25.2
4K Write 91.5
4K Mixed 31.7
127% 49.5 MB/s
DQ Read 594
DQ Write 388
DQ Mixed 490
366% 491 MB/s
91GB free (System drive)
Firmware: BXW1JA0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 589 685 775 828 810 923 MB/s
Read 914
Write 901
Mixed 531
SusWrite 768
175% 778 MB/s
4K Read 25.5
4K Write 60.9
4K Mixed 34.5
115% 40.3 MB/s
DQ Read 322
DQ Write 307
DQ Mixed 355
255% 328 MB/s
72GB free (System drive)
Firmware: BXW3SA0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 594 545 595 521 547 495 MB/s
Read 1,145
Write 721
Mixed 576
SusWrite 549
166% 748 MB/s
4K Read 22.7
4K Write 72.2
4K Mixed 23.2
102% 39.4 MB/s
DQ Read 481
DQ Write 319
DQ Mixed 393
295% 398 MB/s
533 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 21,680,567 SSDs tested.

Typical SM0256G PCIe 251GB Builds (Compare 694 builds) See popular component choices, score breakdowns and rankings.
Gaming 15%
Tree trunk
Desktop 54%
Workstation 25%

System: Apple MacBookPro12,1


Popular SM0256G PCIe 251GB 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) January 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.


1016 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

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