Controller: Samsung Triple Core MEX. Memory: Samsung 40nm MLC V-NAND

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

Real World Speed
Performance profile from 21,476 user samples
20,841 User Benchmarks
Best Bench: 123% 149GB free
Worst Bench: 70% 107GB free
Poor: 70% Great: 123%
SPEED RANK: 57th / 853
635 User Benchmarks
Best Bench: 101% 98GB free
Worst Bench: 60% 35GB free
Poor: 60% Great: 101%
SPEED RANK: 159th / 853
Effective Speed
Effective SSD Speed
99.1 % Faster effective speed.
82.3 % -20%
Avg. Sequential Read Speed
505 MB/s Slightly faster read speed.
452 MB/s -12%
Avg. Sequential Write Speed
442 MB/s Faster write speed.
372 MB/s -19%
4K Read
Avg. 4K Random Read Speed
32.7 MB/s Faster random read.
28 MB/s -17%
4K Write
Avg. 4K Random Write Speed
89.8 MB/s Slightly faster random write.
81.8 MB/s -10%
Avg. Sequential Mixed IO Speed
462 MB/s Faster mixed IO speed.
371 MB/s -25%
4K Mixed
Avg. 4K Random Mixed IO Speed
32.9 MB/s Much faster random mixed IO.
20.9 MB/s -57%
Peak Sequential Read Speed
529 MB/s Slightly faster peak read speed.
485 MB/s -9%
Peak Sequential Write Speed
502 MB/s Slightly faster peak write speed.
472 MB/s -6%
4K Read
Peak 4K Random Read Speed
42 MB/s Faster peak random read.
35.4 MB/s -19%
4K Write
Peak 4K Random Write Speed
127 MB/s Slightly faster peak random write.
119 MB/s -7%
Peak Sequential Mixed IO Speed
513 MB/s Slightly faster peak mixed IO speed.
455 MB/s -13%
4K Mixed
Peak 4K Random Mixed IO Speed
50.4 MB/s Much faster peak random mixed IO.
28.4 MB/s -77%
Market Share
Based on 3,088,444 SSDs tested.
Market Share
Market Share (trailing 30 days)
1.22 % Insanely higher market share.
0.04 % -2,950%
Value For Money
79.6 % Slightly better value.
73.9 % -8%
User Rating
UBM User Rating
97 % Much more popular.
63 % -54%
Price (score)
$130 -19% $105 Cheaper.
35 Months More recent.
49 Months -29%
DQ Read
Peak 4K-64Thread Read Speed
382 MB/s Slightly faster peak deep queue read.
358 MB/s -7%
DQ Write
Peak 4K-64Thread Write Speed
342 MB/s Slightly faster peak deep queue write.
301 MB/s -14%
AS-SSD Total
AS-SSD Total Score
1,254 Pts Slightly stronger server IO.
1,147 Pts -9%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
165 MB/s Hugely faster peak deep queue mixed IO.
67.3 MB/s -145%
ADQ Read
Avg. 4K-64Thread Read Speed
208 MB/s Faster deep queue read.
179 MB/s -16%
ADQ Write
Avg. 4K-64Thread Write Speed
234 MB/s Faster deep queue write.
197 MB/s -19%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
87.7 MB/s Hugely faster deep queue mixed IO.
42.1 MB/s -108%
256GB 240GB

The 256GB Samsung 850 Pro is the fastest consumer SSD we have seen to date. Thanks to Samsung's new 3D V-NAND the 850 Pro has lower power consumption and better performance, albeit marginally, than both the 840 Evo and 840 Pro. Looking at the benchmark figures for the 840 and 850 Pros shows that the effective performance improvement is 10% whereas the 850 Pro beats the 840 Evo by 16%. These drives effectively saturate SATA 3.0 making it difficult to distinguish between them in day-to-day use. At current prices the 850 Pro is prohibitively expensive, prices need to drop by 15% before it approaches the 840 Pro from a value perspective. Samsung may release a value orientated 850 Evo soon, but for now "most" users are better off with the 840 Pro. [Oct '14 SSDrivePro]


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) June 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 $307Nvidia GTX 1070 $390Samsung 850 Evo 250GB $100
AMD Ryzen 7 1700 $278AMD RX 480 $608Samsung 850 Pro 256GB $130
Intel Core i5-7600K $225Nvidia GTX 1060-6GB $239Samsung 850 Evo 500GB $160
Seagate Barracuda 1TB (2016) $42Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $45
Seagate Barracuda 3TB (2016) $83G.SKILL Trident Z DDR4 3200 C14 4x16GB $696SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46HyperX Fury DDR4 2133 C14 2x8GB $133SanDisk Ultra Fit 32GB $13
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