Real World Speed
Performance profile from 811 user samples
811 User Benchmarks
Best Bench: 102% 98GB free
Worst Bench: 60% 44GB free
Poor: 60% Great: 102%
SPEED RANK: 172nd / 859
Effective Speed
Effective SSD Speed
81.7 % -3% 84.5 % +3%
Avg. Sequential Read Speed
451 MB/s -9% 491 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
369 MB/s -1% 374 MB/s +1%
4K Read
Avg. 4K Random Read Speed
27.8 MB/s -6% 29.4 MB/s Slightly faster random read.
4K Write
Avg. 4K Random Write Speed
79.5 MB/s Slightly faster random write.
73.8 MB/s -8%
Avg. Sequential Mixed IO Speed
366 MB/s -6% 387 MB/s Slightly faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
20.9 MB/s -13% 23.5 MB/s Slightly faster random mixed IO.
Peak Sequential Read Speed
486 MB/s -6% 517 MB/s Slightly faster peak read speed.
Peak Sequential Write Speed
473 MB/s Slightly faster peak write speed.
426 MB/s -11%
4K Read
Peak 4K Random Read Speed
35 MB/s -5% 36.9 MB/s Slightly faster peak random read.
4K Write
Peak 4K Random Write Speed
120 MB/s Slightly faster peak random write.
108 MB/s -11%
Peak Sequential Mixed IO Speed
454 MB/s +3% 439 MB/s -3%
4K Mixed
Peak 4K Random Mixed IO Speed
28.5 MB/s -13% 32.2 MB/s Slightly faster peak random mixed IO.
Market Share
Based on 3,864,299 SSDs tested.
User Rating
UBM User Rating
63 % -18% 74.4 % More popular.
Market Share
Market Share (trailing 30 days)
0.03 % -5,807% 1.77 % Insanely higher market share.
Price (score)
$105 Cheaper.
128 USD -22%
Value For Money
73.4 % +3% 71 % -3%
DQ Read
Peak 4K-64Thread Read Speed
357 MB/s Slightly faster peak deep queue read.
336 MB/s -6%
DQ Write
Peak 4K-64Thread Write Speed
299 MB/s +1% 296 MB/s -1%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
67.6 MB/s -22% 82.7 MB/s Faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
181 MB/s +0% 180 MB/s -0%
ADQ Write
Avg. 4K-64Thread Write Speed
198 MB/s Slightly faster deep queue write.
185 MB/s -7%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
42.2 MB/s -13% 47.6 MB/s Slightly faster deep queue mixed IO.
52 Months -40% 37.1 Months Much more recent.
AS-SSD Total
AS-SSD Total Score
1,144 Pts +4% 1,097 Pts -4%
240GB   —

The Sandisk Extreme II uses the 88SS9187-BLD2 controller, Marvel's latest, and Sandisk's own 19MM MLC Memory. On paper this makes an extremely good combination and the benchmarks agree. The Extreme II scored an impressive 1143 in the server orientated AS SSD Benchmark putting it amongst the more capable server drives. In terms of real world consumer performance the Extreme II also fared well achieving a real world speed index score of 570.5 MB/s, amongst the top three scores we have seen to date. The Extreme II has everything going for it apart from its price which is currently significantly above average and hurting its value rating. Because the Extreme is the newest SSD we have in our group test we expect prices will drop with time. Until then, however, there is better value to be had elsewhere. [Jun '13 SSDrivePro]


Solid State Drive Rankings (Price vs Performance) September 2017 SSD Rankings.

Welcome to our consumer SSD comparison. We calculate effective speed based on real world performance then adjust by cost per GB to yield a value for money rating. Calculated values don't always tell the whole picture so we check them against thousands of individual user ratings. The customizable table below combines these factors and more to bring you the definitive list of top SSDs. Share your opinion by voting. [SSDrivePro]

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 (UBM).
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write and mixed IO.
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the highest voted in class.
  • - Find the best upgrades.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

The Best.
Intel Core i7-7700K $295Nvidia GTX 1070 $400Samsung 850 Evo 250GB $97
AMD Ryzen 7 1700 $270AMD RX 480 $350Samsung 850 Pro 256GB $120
Intel Core i5-7600K $210Nvidia GTX 1060-6GB $263Samsung 850 Evo 500GB $150
Seagate Barracuda 1TB (2016) $45G.SKILL Trident Z DDR4 3200 C14 4x16GB $724SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $77Corsair Vengeance LPX DDR4 3000 C15 2x8GB $155SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $56HyperX Fury DDR4 2133 C14 2x8GB $141SanDisk Extreme 16GB $20
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