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 2187 user samples
194 User Benchmarks
Best Bench: 116% 76GB free
Worst Bench: 29% 103GB free
Worst: 29% Best: 116%
SPEED RANK: 78th / 704
1993 User Benchmarks
Best Bench: 114% 125GB free
Worst Bench: 38% 3GB free
Worst: 38% Best: 114%
SPEED RANK: 54th / 704
Effective Speed
Effective SSD Speed
84.9 % -3% 87.6 % +3%
Avg. Sequential Read Speed
442 MB/s -12% 496 MB/s Slightly faster read speed.
Avg. Sequential Write Speed
410 MB/s 0% 410 MB/s 0%
4K Read
Avg. 4K Random Read Speed
27.8 MB/s -3% 28.5 MB/s +3%
4K Write
Avg. 4K Random Write Speed
79.2 MB/s Slightly faster random write.
71.5 MB/s -11%
Avg. Sequential Mixed IO Speed
377 MB/s -12% 424 MB/s Slightly faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
20.9 MB/s -6% 22.2 MB/s Slightly faster random mixed IO.
Peak Sequential Read Speed
488 MB/s -7% 524 MB/s Slightly faster peak read speed.
Peak Sequential Write Speed
487 MB/s -2% 498 MB/s +2%
4K Read
Peak 4K Random Read Speed
36.8 MB/s +1% 36.3 MB/s -1%
4K Write
Peak 4K Random Write Speed
132 MB/s Slightly faster peak random write.
118 MB/s -12%
Peak Sequential Mixed IO Speed
456 MB/s -11% 508 MB/s Slightly faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
29.3 MB/s +3% 28.5 MB/s -3%
Value For Money
46.6 % -9% 50.9 % Slightly better value.
User Rating
UBM User Rating
67 % -3% 69 % +3%
Price (score)
$202 -1% $200 +1%
27 Months More recent.
34 Months -21%
DQ Read
Peak 4K-64Thread Read Speed
366 MB/s -4% 381 MB/s +4%
DQ Write
Peak 4K-64Thread Write Speed
306 MB/s -5% 321 MB/s +5%
AS-SSD Total
AS-SSD Total Score
1,182 Pts -2% 1,210 Pts +2%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
67.2 MB/s -34% 90.3 MB/s Much faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
216 MB/s -12% 243 MB/s Slightly faster deep queue read.
ADQ Write
Avg. 4K-64Thread Write Speed
212 MB/s -3% 218 MB/s +3%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
46.9 MB/s -32% 62.1 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 User Rankings (Charts) August 2015 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]

Group Test Results

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 each of the components in your PC and then compare your results to other users with exactly the same hardware. You can quickly size up your PC and identify hardware problems or bottlenecks.

Benchmark of the month

How it works

  • - Download and run UserBenchMark (UBM)
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - Drive benchmarks include: read, write and mixed IO.
  • - CPU benchmarks include: integer, floating and string.
  • - GPU benchmarks include: DX9 and DX10 3D performance.
  • - 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
  • - Share your opinion by voting
Custom PC Builder (Start a new build) Compare component prices, popularity, speed and value for money.

PC Builder will help you build your perfect PC by clearly presenting relevant performance statistics together with price, compatibility and popularity data.

Frequently Asked Questions


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The Best.
SanDisk Extreme 64GB $36Samsung 850 Pro 256GB $130Intel Core i7-4790K $322Barracuda 7200.14 1TB $48Nvidia GTX 970 $320
SanDisk Extreme 16GB $16Samsung 850 Evo 250GB $90Intel Core i5-4690K $232Seagate Desktop SSHD 1TB $67Nvidia GTX 980 Ti $659
SanDisk Extreme 32GB $22Samsung 850 Evo 500GB $156Intel Pentium G3258 $64WD Black 1TB (2013) $70AMD R9 270X $185
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