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

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

Real World Speed
Performance profile from 109,133 user samples
72,000 User Benchmarks
Best Bench: 94% 48GB free
Worst Bench: 59% 57GB free
Poor: 59% Great: 94%
SPEED RANK: 237th / 911
37,133 User Benchmarks
Best Bench: 121% 182GB free
Worst Bench: 71% 141GB free
Poor: 71% Great: 121%
SPEED RANK: 80th / 911
Effective Speed
Effective SSD Speed
79 % 98.3 % Faster effective speed.
Avg. Sequential Read Speed
485 MB/s 502 MB/s +4%
Avg. Sequential Write Speed
318 MB/s 441 MB/s Much faster write speed.
4K Read
Avg. 4K Random Read Speed
35.9 MB/s Slightly faster random read.
32.6 MB/s
4K Write
Avg. 4K Random Write Speed
57.6 MB/s 85.9 MB/s Much faster random write.
Avg. Sequential Mixed IO Speed
326 MB/s 460 MB/s Much faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
20.4 MB/s 34.4 MB/s Much faster random mixed IO.
Peak Sequential Read Speed
510 MB/s 528 MB/s +4%
Peak Sequential Write Speed
351 MB/s 502 MB/s Much faster peak write speed.
4K Read
Peak 4K Random Read Speed
44.9 MB/s Slightly faster peak random read.
42.1 MB/s
4K Write
Peak 4K Random Write Speed
81.7 MB/s 121 MB/s Much faster peak random write.
Peak Sequential Mixed IO Speed
357 MB/s 513 MB/s Much faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
26.8 MB/s 50.8 MB/s Hugely faster peak random mixed IO.
Market Share
Based on 6,060,410 SSDs tested.
Market Share
Market Share (trailing 30 days)
1.26 % Much higher market share.
0.75 %
Value For Money
51.7 % 75.2 % Much better value.
User Rating
UBM User Rating
58 % 99 % Much more popular.
Price (score)
$167 $139 Cheaper.
56 Months 44 Months More recent.
DQ Read
Peak 4K-64Thread Read Speed
359 MB/s 375 MB/s +4%
DQ Write
Peak 4K-64Thread Write Speed
239 MB/s 336 MB/s Much faster peak deep queue write.
AS-SSD Total
AS-SSD Total Score
1,053 Pts 1,232 Pts Stronger server IO.
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
83.6 MB/s 163 MB/s Hugely faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
192 MB/s 196 MB/s +2%
ADQ Write
Avg. 4K-64Thread Write Speed
151 MB/s 211 MB/s Much faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
49.5 MB/s 88 MB/s Much faster deep queue mixed IO.
250GB 256GB

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]


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) March 2018 SSD Rankings.

Welcome to our 2.5" and M.2 SSD comparison. We calculate effective speed for both SATA and NVMe drives based on real world performance then adjust by current prices per GB to yield a value for money rating. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top SSDs. [SSDrivePro]


Group Test Results

  • Best user rated - Sometimes benchmarks get it completely wrong...
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance, price and capacity.
  • Raw speed comparison - Raw speed readings.
  • Details ordered by value - Detailed performance stats ordered by overall value for money.
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 i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $85
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $335Samsung 850 Evo 500GB $150
AMD Ryzen 5 1600 $188AMD RX 480 $400Samsung 850 Pro 256GB $139
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $190SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $931SanDisk Extreme 32GB $23
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $216SanDisk Extreme 16GB $18
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