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

Real World Speed
Performance profile from 248,702 user samples
22,305 User Benchmarks
Best Bench: 269% 620GB free
Worst Bench: 149% 23GB free
Poor: 149% Great: 269%
SPEED RANK: 11th / 873
226,397 User Benchmarks
Best Bench: 115% 71GB free
Worst Bench: 70% 144GB free
Poor: 70% Great: 115%
SPEED RANK: 66th / 873
Effective Speed
Effective SSD Speed
218 % Hugely faster effective speed.
95 % -129%
Avg. Sequential Read Speed
1913 MB/s Hugely faster read speed.
500 MB/s -283%
Avg. Sequential Write Speed
1153 MB/s Hugely faster write speed.
396 MB/s -191%
4K Read
Avg. 4K Random Read Speed
44.1 MB/s Faster random read.
37.9 MB/s -16%
4K Write
Avg. 4K Random Write Speed
130 MB/s Much faster random write.
77.6 MB/s -68%
Avg. Sequential Mixed IO Speed
1307 MB/s Hugely faster mixed IO speed.
402 MB/s -225%
4K Mixed
Avg. 4K Random Mixed IO Speed
43 MB/s Faster random mixed IO.
33.1 MB/s -30%
Peak Sequential Read Speed
2339 MB/s Hugely faster peak read speed.
517 MB/s -352%
Peak Sequential Write Speed
1458 MB/s Hugely faster peak write speed.
417 MB/s -250%
4K Read
Peak 4K Random Read Speed
52 MB/s Slightly faster peak random read.
47.1 MB/s -10%
4K Write
Peak 4K Random Write Speed
185 MB/s Much faster peak random write.
106 MB/s -75%
Peak Sequential Mixed IO Speed
1586 MB/s Hugely faster peak mixed IO speed.
422 MB/s -276%
4K Mixed
Peak 4K Random Mixed IO Speed
60.3 MB/s Faster peak random mixed IO.
48.2 MB/s -25%
Market Share
Based on 5,194,731 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.42 % -2,017% 8.89 % Insanely higher market share.
Value For Money
95 % -4% 98.8 % +4%
User Rating
UBM User Rating
51 % -145% 125 % Hugely more popular.
Price (score)
$586 -85% $90 Hugely cheaper.
DQ Read
Peak 4K-64Thread Read Speed
662 MB/s Much faster peak deep queue read.
374 MB/s -77%
DQ Write
Peak 4K-64Thread Write Speed
398 MB/s Much faster peak deep queue write.
283 MB/s -41%
AS-SSD Total
AS-SSD Total Score
2,133 Pts Hugely stronger server IO.
1,158 Pts -84%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
231 MB/s Hugely faster peak deep queue mixed IO.
120 MB/s -92%
ADQ Read
Avg. 4K-64Thread Read Speed
325 MB/s Much faster deep queue read.
187 MB/s -74%
ADQ Write
Avg. 4K-64Thread Write Speed
281 MB/s Much faster deep queue write.
185 MB/s -52%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
129 MB/s Hugely faster deep queue mixed IO.
64 MB/s -102%
512GB 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

 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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