Controller: Samsung Dual Core MGX. Memory: Samsung 40nm TLC V-NAND

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

Real World Speed
Performance profile from 229,465 user samples
181,090 User Benchmarks
Best Bench: 116% 99GB free
Worst Bench: 72% 33GB free
Poor: 72% Great: 116%
SPEED RANK: 66th / 860
48,375 User Benchmarks
Best Bench: 97% 3GB free
Worst Bench: 55% 122GB free
Poor: 55% Great: 97%
SPEED RANK: 200th / 860
Effective Speed
Effective SSD Speed
95.9 % Faster effective speed.
79.8 % -20%
Avg. Sequential Read Speed
499 MB/s +3% 484 MB/s -3%
Avg. Sequential Write Speed
396 MB/s Faster write speed.
315 MB/s -26%
4K Read
Avg. 4K Random Read Speed
38.8 MB/s Slightly faster random read.
36.6 MB/s -6%
4K Write
Avg. 4K Random Write Speed
79.6 MB/s Much faster random write.
59.4 MB/s -34%
Avg. Sequential Mixed IO Speed
397 MB/s Faster mixed IO speed.
324 MB/s -23%
4K Mixed
Avg. 4K Random Mixed IO Speed
33.3 MB/s Much faster random mixed IO.
20.8 MB/s -60%
Peak Sequential Read Speed
517 MB/s +1% 510 MB/s -1%
Peak Sequential Write Speed
417 MB/s Faster peak write speed.
353 MB/s -18%
4K Read
Peak 4K Random Read Speed
47.5 MB/s +4% 45.7 MB/s -4%
4K Write
Peak 4K Random Write Speed
109 MB/s Faster peak random write.
84.1 MB/s -30%
Peak Sequential Mixed IO Speed
422 MB/s Faster peak mixed IO speed.
358 MB/s -18%
4K Mixed
Peak 4K Random Mixed IO Speed
48.2 MB/s Much faster peak random mixed IO.
27.5 MB/s -75%
Market Share
Based on 4,121,346 SSDs tested.
Market Share
Market Share (trailing 30 days)
9.14 % Hugely higher market share.
1.95 % -369%
Value For Money
93.5 % Much better value.
56.5 % -65%
User Rating
UBM User Rating
121 % Hugely more popular.
66 % -83%
Price (score)
$98 Much cheaper.
$150 -35%
34 Months Much more recent.
51 Months -33%
DQ Read
Peak 4K-64Thread Read Speed
379 MB/s +3% 369 MB/s -3%
DQ Write
Peak 4K-64Thread Write Speed
284 MB/s Faster peak deep queue write.
241 MB/s -18%
AS-SSD Total
AS-SSD Total Score
1,171 Pts Slightly stronger server IO.
1,074 Pts -9%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
118 MB/s Much faster peak deep queue mixed IO.
84.7 MB/s -39%
ADQ Read
Avg. 4K-64Thread Read Speed
193 MB/s -3% 199 MB/s +3%
ADQ Write
Avg. 4K-64Thread Write Speed
188 MB/s Faster deep queue write.
153 MB/s -23%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
65.8 MB/s Much faster deep queue mixed IO.
48.2 MB/s -37%
250GB 250GB

The 250GB Samsung 850 Evo has a similar architecture to its hugely successful predecessor, the 840 Evo. Both drives are TLC based but the 850 uses 3D V-NAND as opposed to regular NAND. Both drives also feature a Turbowrite cache (TWC) which buffers up to 3GB of writes. The TWC enables high burst write speeds but when the cache exhausts write speeds drop to 300 MB/s. Comparing the 850 and 840 Evos shows that effective speed, has improved by 11% and the warranty has been extended from three to five years but prices are also up by 11%. The 850 Evo does put in superb benchmarks (second only to the 850 Pro) but these are only valid within the TWC. At current price levels the 850 Evo struggles to compete with the value leaders[Dec '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) October 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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Intel Core i7-7700K $300Nvidia GTX 1070 $394Samsung 850 Evo 250GB $98
AMD Ryzen 7 1700 $280AMD RX 480 $491Samsung 850 Pro 256GB $126
Intel Core i5-7600K $230Nvidia GTX 1060-6GB $260Samsung 850 Evo 500GB $150
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $163SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $842SanDisk Extreme 32GB $22
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $180SanDisk Ultra Fit 32GB $13
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