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

Real World Speed
Performance profile from 48,345 user samples
32,149 User Benchmarks
Best Bench: 123% 158GB free
Worst Bench: 68% 96GB free
Poor: 68% Great: 123%
SPEED RANK: 60th / 873
16,196 User Benchmarks
Best Bench: 87% 136GB free
Worst Bench: 52% 129GB free
Poor: 52% Great: 87%
SPEED RANK: 307th / 873
Effective Speed
Effective SSD Speed
99.7 % Much faster effective speed.
71.8 % -39%
Avg. Sequential Read Speed
506 MB/s Slightly faster read speed.
473 MB/s -7%
Avg. Sequential Write Speed
444 MB/s Much faster write speed.
257 MB/s -73%
4K Read
Avg. 4K Random Read Speed
32.8 MB/s -3% 33.7 MB/s +3%
4K Write
Avg. 4K Random Write Speed
88.4 MB/s Hugely faster random write.
48.8 MB/s -81%
Avg. Sequential Mixed IO Speed
462 MB/s Much faster mixed IO speed.
258 MB/s -79%
4K Mixed
Avg. 4K Random Mixed IO Speed
34.7 MB/s Much faster random mixed IO.
20.4 MB/s -70%
Peak Sequential Read Speed
529 MB/s Slightly faster peak read speed.
495 MB/s -7%
Peak Sequential Write Speed
502 MB/s Hugely faster peak write speed.
275 MB/s -83%
4K Read
Peak 4K Random Read Speed
42.6 MB/s +2% 41.8 MB/s -2%
4K Write
Peak 4K Random Write Speed
124 MB/s Hugely faster peak random write.
67.3 MB/s -84%
Peak Sequential Mixed IO Speed
513 MB/s Hugely faster peak mixed IO speed.
279 MB/s -84%
4K Mixed
Peak 4K Random Mixed IO Speed
51.3 MB/s Much faster peak random mixed IO.
29.1 MB/s -76%
Market Share
Based on 5,194,955 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.98 % Much higher market share.
0.63 % -56%
Value For Money
90.8 % Much better value.
64.2 % -41%
User Rating
UBM User Rating
99 % Hugely more popular.
52 % -90%
Price (score)
$110 +0% $110 -0%
DQ Read
Peak 4K-64Thread Read Speed
380 MB/s Slightly faster peak deep queue read.
352 MB/s -8%
DQ Write
Peak 4K-64Thread Write Speed
338 MB/s Hugely faster peak deep queue write.
187 MB/s -81%
AS-SSD Total
AS-SSD Total Score
1,245 Pts Much stronger server IO.
957 Pts -30%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
162 MB/s Hugely faster peak deep queue mixed IO.
70.5 MB/s -130%
ADQ Read
Avg. 4K-64Thread Read Speed
204 MB/s Slightly faster deep queue read.
185 MB/s -10%
ADQ Write
Avg. 4K-64Thread Write Speed
224 MB/s Hugely faster deep queue write.
119 MB/s -88%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
89.8 MB/s Hugely faster deep queue mixed IO.
39.4 MB/s -128%
256GB 250GB

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) January 2018 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 $280Nvidia GTX 1070 $430Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $290Nvidia GTX 1060-6GB $275Samsung 850 Evo 500GB $140
Intel Core i5-7600K $210AMD RX 480 $400Samsung 850 Pro 256GB $110
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $205SanDisk Extreme 64GB $65
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $51Corsair Vengeance LPX DDR4 3200 C16 2x8GB $220SanDisk Ultra Fit 32GB $12
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