Controller: Marvell 88SS9187-BLD2. Flash Memory: SanDisk 19nm eX2 ABL MLC.

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC.

Real World Speed
Performance profile from 7,755 user samples
444 User Benchmarks
Best Bench: 103% 76GB free
Worst Bench: 60% 153GB free
Worst: 60% Best: 103%
SPEED RANK: 124th / 806
7,311 User Benchmarks
Best Bench: 107% 8GB free
Worst Bench: 49% 14GB free
Worst: 49% Best: 107%
SPEED RANK: 153rd / 806
Effective Speed
Effective SSD Speed
82.7 % +2% 81 % -2%
Avg. Sequential Read Speed
448 MB/s -8% 482 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
382 MB/s Faster write speed.
328 MB/s -16%
4K Read
Avg. 4K Random Read Speed
28 MB/s -1% 28.2 MB/s +1%
4K Write
Avg. 4K Random Write Speed
81.3 MB/s Slightly faster random write.
76.7 MB/s -6%
Avg. Sequential Mixed IO Speed
373 MB/s +3% 363 MB/s -3%
4K Mixed
Avg. 4K Random Mixed IO Speed
20.8 MB/s -3% 21.5 MB/s +3%
Peak Sequential Read Speed
486 MB/s -7% 521 MB/s Slightly faster peak read speed.
Peak Sequential Write Speed
476 MB/s -2% 484 MB/s +2%
4K Read
Peak 4K Random Read Speed
35.5 MB/s -2% 36.3 MB/s +2%
4K Write
Peak 4K Random Write Speed
123 MB/s Slightly faster peak random write.
116 MB/s -6%
Peak Sequential Mixed IO Speed
454 MB/s -11% 506 MB/s Slightly faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
29 MB/s +2% 28.3 MB/s -2%
Market Share
Based on 1,403,107 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.1 % -700% 0.8 % Hugely higher market share.
Value For Money
74.3 % Much better value.
43.3 % -72%
User Rating
UBM User Rating
60 % -2% 61 % +2%
Price (score)
$105 Much cheaper.
$224 -53%
41 Months Slightly more recent.
48 Months -15%
DQ Read
Peak 4K-64Thread Read Speed
361 MB/s -4% 376 MB/s +4%
DQ Write
Peak 4K-64Thread Write Speed
304 MB/s -4% 316 MB/s +4%
AS-SSD Total
AS-SSD Total Score
1,160 Pts -3% 1,193 Pts +3%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
67.6 MB/s -34% 90.6 MB/s Much faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
188 MB/s -12% 210 MB/s Slightly faster deep queue read.
ADQ Write
Avg. 4K-64Thread Write Speed
193 MB/s +1% 191 MB/s -1%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
41.6 MB/s -31% 54.3 MB/s Much faster deep queue mixed IO.
240GB 256GB

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]


The 840 Pro is stunning. Samsung have created a completely in-house package including both the controller and their own new 21nm toggle mode NAND. On release (Oct '12) this was the fastest performing deep queue depth consumer grade SSD available. Fast forward six months (Apr '13) and the 840 Pro still holds both the random read/write deep queue depth speed records of 384 MB/s and 326 MB/s, impressive considering how fast the SSD space tends to move. There are no obvious weaknesses, in-fact the 840 pro takes first place in nearly all of the speed categories and is only seriously rivalled by one drive, the OCZ Vector. To conclude, in terms of both outright performance, particularly server orientated, and value for money the 256GB and 128GB 840 Pros are amongst the top handful of drives currently available. [Jun '13 SSDrivePro]


Solid State Drive Rankings (Price vs Performance) October 2016 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

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Intel Core i7-6700K $298Nvidia GTX 970 $237Samsung 850 Evo 250GB $95
Intel Core i5-6600K $210Nvidia GTX 1070 $390Samsung 850 Pro 256GB $120
Intel Core i7-4790K $310AMD RX 480 $220Samsung 850 Evo 500GB $150
WD Black 1TB (2013) $69Corsair Vengeance LPX DDR4 3000 C15 2x8GB $90SanDisk Extreme 64GB $30
Seagate Barracuda 7200.14 1TB $43HyperX Fury DDR4 2133 C14 2x8GB $86SanDisk Extreme 32GB $21
WD Black 2TB (2013) $122G.SKILL Trident Z DDR4 3200 C14 4x16GB $544SanDisk Extreme 16GB $18
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