Average Bench: 152% (110th of 1011)

Based on 614 user benchmarks.  Model: APPLE SSD SM0256G

Outstanding average bench

The Apple SM0256G PCIe 251GB averaged 51.6% 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 269MB/s
Avg. Sequential Read Speed 1,362MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Apple SM0256G PCIe 251GB is 90.4%. 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 59.4MB/s
Avg. 4K Random Mixed IO Speed 26MB/s

Average Bench

(Based on 614 samples)
Min Avg Max
745 Read 1,362 1,848
477 Write 888 1,204
463 Mixed 835 1,318
361 SusWrite 769 1,216
215% 964 MB/s
Min Avg Max
15.1 4K Read 30.3 41.5
19.9 4K Write 59.4 115
8.58 4K Mixed 26 46.5
111% 38.6 MB/s
Min Avg Max
15.7 DQ Read 343 629
28.6 DQ Write 256 395
9.4 DQ Mixed 269 513
209% 289 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
92GB free (System drive)
Firmware: BXZ33A0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 14 11 13 22 22 22 MB/s
Read 3397
Write 22.2
Mixed 45.5
SusWrite 17.4
181% 871 MB/s
4K Read 432
4K Write 1.9
4K Mixed 3.6
661% 146 MB/s
55GB free (System drive)
Firmware: BXZ13A0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 865 808 792 772 713 653 MB/s
Read 1,370
Write 926
Mixed 707
SusWrite 767
210% 942 MB/s
4K Read 19.5
4K Write 92.7
4K Mixed 27.8
114% 46.7 MB/s
DQ Read 617
DQ Write 338
DQ Mixed 516
374% 491 MB/s
82GB free (System drive)
Firmware: BXW1PA0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 602 551 507 538 478 514 MB/s
Read 1,314
Write 844
Mixed 652
SusWrite 532
186% 836 MB/s
4K Read 28.5
4K Write 93.9
4K Mixed 33
135% 51.8 MB/s
DQ Read 583
DQ Write 323
DQ Mixed 484
352% 463 MB/s
614 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 18,319,524 SSDs tested.

Typical SM0256G PCIe 251GB Builds (Compare 644 builds) See popular component choices, score breakdowns and rankings.
Gaming 14%
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) October 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.


1011 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 $140Nvidia GTX 1660 $220Samsung 850 Evo 250GB $55
Intel Core i5-9600K $225Nvidia GTX 1660-Ti $275Samsung 850 Evo 500GB $107
Intel Core i7-9700K $288Nvidia RTX 2060S (Super) $430Samsung 850 Pro 256GB $200
Seagate Barracuda 1TB (2016) $40Corsair Vengeance LPX DDR4 3000 C15 2x8GB $76SanDisk Extreme 64GB $88
WD Blue 1TB (2012) $37G.SKILL Trident Z DDR4 3200 C14 4x16GB $603SanDisk Extreme 32GB $48
Seagate Barracuda 3TB (2016) $83Corsair Vengeance LPX DDR4 3200 C16 2x8GB $83SanDisk Ultra Fit 32GB $14
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