Average Bench: 150% (106th of 1003)

Based on 697 user benchmarks.  Model: APPLE SSD SM0256G

Outstanding average bench

The Apple SM0256G PCIe 251GB averaged 49.5% 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. Sequential Read Speed 1,427MB/s
Avg. 4K-64Thread Mixed IO Speed 175MB/s

Terrible consistency

The range of scores (95th - 5th percentile) for the Apple SM0256G PCIe 251GB is 89.8%. 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 53.1MB/s
Avg. 4K Random Mixed IO Speed 23.1MB/s

Average Bench

(Based on 697 samples)
Min Avg Max
920 Read 1,427 1,884
483 Write 887 1,204
503 Mixed 947 1,358
369 SusWrite 783 1,231
226% 1,011 MB/s
Min Avg Max
15 4K Read 27.9 40.5
20.2 4K Write 53.1 117
8.2 4K Mixed 23.1 43.9
100% 34.7 MB/s
Min Avg Max
14.5 DQ Read 245 626
23.8 DQ Write 216 390
8.6 DQ Mixed 175 508
146% 212 MB/s
User Benchmarks Bench Sequential Random 4k Deep queue 4k
The fastest SSD (mainstream) averages a speed of 100%
234GB free
Firmware: BXW1JA0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 1139 1176 1145 1172 1149 1168 MB/s
Read 1,324
Write 1,086
Mixed 652
SusWrite 1,158
237% 1,055 MB/s
4K Read 32.6
4K Write 122
4K Mixed 44.2
170% 66.1 MB/s
DQ Read 621
DQ Write 350
DQ Mixed 495
366% 489 MB/s
60GB free (System drive)
Firmware: BXW3SA0Q Max speed: PCIe 5,000 MB/s
SusWrite @10s intervals: 628 523 452 416 379 369 MB/s
Read 802
Write 698
Mixed 381
SusWrite 461
131% 585 MB/s
4K Read 17.2
4K Write 48.3
4K Mixed 24.4
83% 30 MB/s
DQ Read 490
DQ Write 289
DQ Mixed 389
290% 389 MB/s
697 MORE »

 Market Share (See Leaders)

The number of benchmark samples for this model as a percentage of all 14,993,344 SSDs tested.

Typical SM0256G PCIe 251GB Builds (Compare 584 builds) See popular component choices, score breakdowns and rankings.
Gaming 16%
Desktop 56%
Workstation 29%

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.

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


1003 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 $365Nvidia GTX 1070 $390Samsung 850 Evo 250GB $86
AMD Ryzen 5 2600 $144Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $100
AMD Ryzen 7 2700X $280Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $97
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $79SanDisk Extreme 64GB $128
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $639SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $85SanDisk Ultra Fit 32GB $12
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