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

Controller: Samsung 3 Core MEX. Memory: Samsung 19nm Toggle Mode TLC.

Real World Speed
Performance profile from 86,147 user samples
31,789 User Benchmarks
Best Bench: 123% 123GB free
Worst Bench: 71% 12GB free
Poor: 71% Great: 123%
SPEED RANK: 58th / 873
54,358 User Benchmarks
Best Bench: 96% 32GB free
Worst Bench: 55% 73GB free
Poor: 55% Great: 96%
SPEED RANK: 215th / 873
Effective Speed
Effective SSD Speed
101 % Faster effective speed.
79.3 % -28%
Avg. Sequential Read Speed
505 MB/s +4% 485 MB/s -4%
Avg. Sequential Write Speed
446 MB/s Much faster write speed.
316 MB/s -41%
4K Read
Avg. 4K Random Read Speed
33.4 MB/s -8% 36.2 MB/s Slightly faster random read.
4K Write
Avg. 4K Random Write Speed
91 MB/s Much faster random write.
58.3 MB/s -56%
Avg. Sequential Mixed IO Speed
465 MB/s Much faster mixed IO speed.
325 MB/s -43%
4K Mixed
Avg. 4K Random Mixed IO Speed
35.5 MB/s Much faster random mixed IO.
20.5 MB/s -73%
Peak Sequential Read Speed
529 MB/s +4% 510 MB/s -4%
Peak Sequential Write Speed
503 MB/s Much faster peak write speed.
352 MB/s -43%
4K Read
Peak 4K Random Read Speed
43.4 MB/s -6% 45.9 MB/s Slightly faster peak random read.
4K Write
Peak 4K Random Write Speed
126 MB/s Much faster peak random write.
84.2 MB/s -50%
Peak Sequential Mixed IO Speed
514 MB/s Much faster peak mixed IO speed.
357 MB/s -44%
4K Mixed
Peak 4K Random Mixed IO Speed
53.5 MB/s Hugely faster peak random mixed IO.
27.1 MB/s -97%
Market Share
Based on 4,725,021 SSDs tested.
Market Share
Market Share (trailing 30 days)
1.04 % -54% 1.6 % Much higher market share.
Value For Money
89.6 % Much better value.
54.1 % -66%
User Rating
UBM User Rating
98 % Much more popular.
68 % -44%
Price (score)
$114 Cheaper.
$158 -28%
41 Months More recent.
53 Months -23%
DQ Read
Peak 4K-64Thread Read Speed
382 MB/s +4% 367 MB/s -4%
DQ Write
Peak 4K-64Thread Write Speed
344 MB/s Much faster peak deep queue write.
241 MB/s -43%
AS-SSD Total
AS-SSD Total Score
1,258 Pts Stronger server IO.
1,071 Pts -17%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
163 MB/s Hugely faster peak deep queue mixed IO.
83.8 MB/s -95%
ADQ Read
Avg. 4K-64Thread Read Speed
213 MB/s Slightly faster deep queue read.
193 MB/s -10%
ADQ Write
Avg. 4K-64Thread Write Speed
228 MB/s Much faster deep queue write.
154 MB/s -48%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
89.6 MB/s Hugely faster deep queue mixed IO.
48.3 MB/s -86%
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]


The Evo is remarkable in that, like the Sandisk Extreme II, it features a second level cache. For the 250 GB Evo this consists of a 3 GB Turbowrite cache (TWC) which is a block of high speed Flash Memory. When the TWC is exhausted write speeds drop by approximately 50% but that won't often happen under typical consumer workloads. In terms of raw performance, even with its cache, the Evo still isn't the fastest drive. With a real world speed index reading of 439 MB/s the EVO is however, within reach of the two speed leaders (Vector and 850 Pro). At a price point of $130 the Evo is around 30% cheaper making it the best value for money SSDs I have seen in 2014. Comparing the Evo and the Sandisk Ultra Plus shows that the Evo is the winner but the Sandisk may be a viable alternative thanks to its cache-free, and therefore more consistent performance during extended writes. [Aug '14 SSDrivePro]


Solid State Drive Rankings (Price vs Performance) December 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 $313Nvidia GTX 1070 $410Samsung 850 Evo 250GB $90
AMD Ryzen 7 1700 $285AMD RX 480 $265Samsung 850 Evo 500GB $140
Intel Core i5-7600K $215Nvidia GTX 1060-6GB $260Samsung 850 Pro 256GB $114
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $200SanDisk Extreme 64GB $41
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $1,050SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $215SanDisk Ultra Fit 32GB $10
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