Group Average(9 Highest-Voted)

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

Real World Speed
Performance profile from 13,962 user samples
13,962 User Benchmarks
Best Bench: 123% 238GB free
Worst Bench: 76% 187GB free
Poor: 76% Great: 123%
SPEED RANK: 44th / 836
Effective Speed
Effective SSD Speed
101 % Faster effective speed.
82.1 % -23%
Avg. Sequential Read Speed
505 MB/s +5% 483 MB/s -5%
Avg. Sequential Write Speed
452 MB/s Faster write speed.
353 MB/s -28%
4K Read
Avg. 4K Random Read Speed
32.6 MB/s Faster random read.
28.1 MB/s -16%
4K Write
Avg. 4K Random Write Speed
90.4 MB/s Faster random write.
74 MB/s -22%
Avg. Sequential Mixed IO Speed
471 MB/s Faster mixed IO speed.
374 MB/s -26%
4K Mixed
Avg. 4K Random Mixed IO Speed
35.1 MB/s Much faster random mixed IO.
22.9 MB/s -53%
Peak Sequential Read Speed
529 MB/s +3% 513 MB/s -3%
Peak Sequential Write Speed
501 MB/s Faster peak write speed.
397 MB/s -26%
4K Read
Peak 4K Random Read Speed
42.1 MB/s Faster peak random read.
35.9 MB/s -17%
4K Write
Peak 4K Random Write Speed
128 MB/s Faster peak random write.
109 MB/s -18%
Peak Sequential Mixed IO Speed
514 MB/s Faster peak mixed IO speed.
417 MB/s -23%
4K Mixed
Peak 4K Random Mixed IO Speed
50.6 MB/s Much faster peak random mixed IO.
32.3 MB/s -56%
Market Share
Based on 2,131,577 SSDs tested.
User Rating
UBM User Rating
94 % More popular.
72.7 % -29%
Market Share
Market Share (trailing 30 days)
1.5 % Slightly higher market share.
1.39 % -8%
Price (score)
$130 -19% 109 USD Cheaper.
Value For Money
81.4 % Slightly better value.
76.6 % -6%
DQ Read
Peak 4K-64Thread Read Speed
384 MB/s Slightly faster peak deep queue read.
339 MB/s -13%
DQ Write
Peak 4K-64Thread Write Speed
346 MB/s Faster peak deep queue write.
286 MB/s -21%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
167 MB/s Hugely faster peak deep queue mixed IO.
84.8 MB/s -97%
ADQ Read
Avg. 4K-64Thread Read Speed
226 MB/s Faster deep queue read.
180 MB/s -25%
ADQ Write
Avg. 4K-64Thread Write Speed
239 MB/s Faster deep queue write.
188 MB/s -27%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
98.9 MB/s Hugely faster deep queue mixed IO.
48.6 MB/s -104%
31 Months -17% 26.6 Months More recent.
AS-SSD Total
AS-SSD Total Score
1,262 Pts Stronger server IO.
1,085 Pts -16%
256GB   —

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]


Solid State Drive Rankings (Price vs Performance) February 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

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The Best.
Intel Core i7-7700K $339Nvidia GTX 1070 $370Samsung 850 Evo 250GB $94
Intel Core i5-7600K $240AMD RX 480 $177Samsung 850 Pro 256GB $130
Intel Pentium G4560 $60Nvidia GTX 1060-6GB $240Samsung 850 Evo 500GB $170
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $125SanDisk Extreme 64GB $30
Seagate Barracuda 3TB (2016) $90G.SKILL Trident Z DDR4 3200 C14 4x16GB $650SanDisk Extreme 32GB $26
Seagate Barracuda 7200.14 1TB $37HyperX Fury DDR4 2133 C14 2x8GB $120SanDisk Extreme 16GB $18
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