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

Real World Speed
Performance profile from 54,454 user samples
22,305 User Benchmarks
Best Bench: 269% 620GB free
Worst Bench: 149% 23GB free
Poor: 149% Great: 269%
SPEED RANK: 11th / 873
32,149 User Benchmarks
Best Bench: 123% 158GB free
Worst Bench: 68% 96GB free
Poor: 68% Great: 123%
SPEED RANK: 60th / 873
Effective Speed
Effective SSD Speed
218 % Hugely faster effective speed.
99.7 % -118%
Avg. Sequential Read Speed
1913 MB/s Hugely faster read speed.
506 MB/s -278%
Avg. Sequential Write Speed
1153 MB/s Hugely faster write speed.
444 MB/s -160%
4K Read
Avg. 4K Random Read Speed
44.1 MB/s Much faster random read.
32.8 MB/s -34%
4K Write
Avg. 4K Random Write Speed
130 MB/s Much faster random write.
88.4 MB/s -47%
Avg. Sequential Mixed IO Speed
1307 MB/s Hugely faster mixed IO speed.
462 MB/s -183%
4K Mixed
Avg. 4K Random Mixed IO Speed
43 MB/s Faster random mixed IO.
34.7 MB/s -24%
Peak Sequential Read Speed
2339 MB/s Hugely faster peak read speed.
529 MB/s -342%
Peak Sequential Write Speed
1458 MB/s Hugely faster peak write speed.
502 MB/s -190%
4K Read
Peak 4K Random Read Speed
52 MB/s Faster peak random read.
42.6 MB/s -22%
4K Write
Peak 4K Random Write Speed
185 MB/s Much faster peak random write.
124 MB/s -49%
Peak Sequential Mixed IO Speed
1586 MB/s Hugely faster peak mixed IO speed.
513 MB/s -209%
4K Mixed
Peak 4K Random Mixed IO Speed
60.3 MB/s Faster peak random mixed IO.
51.3 MB/s -18%
Market Share
Based on 5,194,731 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.42 % -133% 0.98 % Hugely higher market share.
Value For Money
95 % +5% 90.8 % -5%
User Rating
UBM User Rating
51 % -94% 99 % Hugely more popular.
Price (score)
$586 -81% $110 Hugely cheaper.
DQ Read
Peak 4K-64Thread Read Speed
662 MB/s Much faster peak deep queue read.
380 MB/s -74%
DQ Write
Peak 4K-64Thread Write Speed
398 MB/s Faster peak deep queue write.
338 MB/s -18%
AS-SSD Total
AS-SSD Total Score
2,133 Pts Much stronger server IO.
1,245 Pts -71%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
231 MB/s Much faster peak deep queue mixed IO.
162 MB/s -43%
ADQ Read
Avg. 4K-64Thread Read Speed
325 MB/s Much faster deep queue read.
204 MB/s -59%
ADQ Write
Avg. 4K-64Thread Write Speed
281 MB/s Faster deep queue write.
224 MB/s -25%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
129 MB/s Much faster deep queue mixed IO.
89.8 MB/s -44%
512GB 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) 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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