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

Real World Speed
Performance profile from 242,593 user samples
226,397 User Benchmarks
Best Bench: 115% 71GB free
Worst Bench: 70% 144GB free
Poor: 70% Great: 115%
SPEED RANK: 66th / 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
95 % Much faster effective speed.
71.8 % -32%
Avg. Sequential Read Speed
500 MB/s Slightly faster read speed.
473 MB/s -6%
Avg. Sequential Write Speed
396 MB/s Much faster write speed.
257 MB/s -54%
4K Read
Avg. 4K Random Read Speed
37.9 MB/s Slightly faster random read.
33.7 MB/s -12%
4K Write
Avg. 4K Random Write Speed
77.6 MB/s Much faster random write.
48.8 MB/s -59%
Avg. Sequential Mixed IO Speed
402 MB/s Much faster mixed IO speed.
258 MB/s -56%
4K Mixed
Avg. 4K Random Mixed IO Speed
33.1 MB/s Much faster random mixed IO.
20.4 MB/s -62%
Peak Sequential Read Speed
517 MB/s +4% 495 MB/s -4%
Peak Sequential Write Speed
417 MB/s Much faster peak write speed.
275 MB/s -52%
4K Read
Peak 4K Random Read Speed
47.1 MB/s Slightly faster peak random read.
41.8 MB/s -13%
4K Write
Peak 4K Random Write Speed
106 MB/s Much faster peak random write.
67.3 MB/s -58%
Peak Sequential Mixed IO Speed
422 MB/s Much faster peak mixed IO speed.
279 MB/s -51%
4K Mixed
Peak 4K Random Mixed IO Speed
48.2 MB/s Much faster peak random mixed IO.
29.1 MB/s -66%
Market Share
Based on 5,194,955 SSDs tested.
Market Share
Market Share (trailing 30 days)
8.89 % Insanely higher market share.
0.63 % -1,311%
Value For Money
98.8 % Much better value.
64.2 % -54%
User Rating
UBM User Rating
125 % Hugely more popular.
52 % -140%
Price (score)
$90 Cheaper.
$110 -18%
DQ Read
Peak 4K-64Thread Read Speed
374 MB/s Slightly faster peak deep queue read.
352 MB/s -6%
DQ Write
Peak 4K-64Thread Write Speed
283 MB/s Much faster peak deep queue write.
187 MB/s -51%
AS-SSD Total
AS-SSD Total Score
1,158 Pts Stronger server IO.
957 Pts -21%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
120 MB/s Much faster peak deep queue mixed IO.
70.5 MB/s -70%
ADQ Read
Avg. 4K-64Thread Read Speed
187 MB/s +1% 185 MB/s -1%
ADQ Write
Avg. 4K-64Thread Write Speed
185 MB/s Much faster deep queue write.
119 MB/s -55%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
64 MB/s Much faster deep queue mixed IO.
39.4 MB/s -62%
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]


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

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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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