Real World Speed
Performance profile from 115,591 user samples
115,591 User Benchmarks
Best Bench: 117% 131GB free
Worst Bench: 67% 90GB free
Poor: 67% Great: 117%
SPEED RANK: 63rd / 850
Effective Speed
Effective SSD Speed
94.3 % Slightly faster effective speed.
82.4 % -14%
Avg. Sequential Read Speed
495 MB/s +2% 485 MB/s -2%
Avg. Sequential Write Speed
389 MB/s Slightly faster write speed.
364 MB/s -7%
4K Read
Avg. 4K Random Read Speed
37.9 MB/s Faster random read.
29.7 MB/s -28%
4K Write
Avg. 4K Random Write Speed
76.9 MB/s Slightly faster random write.
70 MB/s -10%
Avg. Sequential Mixed IO Speed
398 MB/s Slightly faster mixed IO speed.
374 MB/s -6%
4K Mixed
Avg. 4K Random Mixed IO Speed
32.5 MB/s Much faster random mixed IO.
22.3 MB/s -46%
Peak Sequential Read Speed
518 MB/s +1% 515 MB/s -1%
Peak Sequential Write Speed
417 MB/s -2% 426 MB/s +2%
4K Read
Peak 4K Random Read Speed
47.4 MB/s Faster peak random read.
37.6 MB/s -26%
4K Write
Peak 4K Random Write Speed
108 MB/s +4% 104 MB/s -4%
Peak Sequential Mixed IO Speed
422 MB/s -2% 431 MB/s +2%
4K Mixed
Peak 4K Random Mixed IO Speed
48.2 MB/s Much faster peak random mixed IO.
30.9 MB/s -56%
Market Share
Based on 2,833,001 SSDs tested.
User Rating
UBM User Rating
112 % Much more popular.
73.6 % -52%
Market Share
Market Share (trailing 30 days)
8.9 % Hugely higher market share.
1.74 % -413%
Price (score)
$102 Cheaper.
129 USD -27%
Value For Money
89.2 % Much better value.
68.1 % -31%
DQ Read
Peak 4K-64Thread Read Speed
379 MB/s Slightly faster peak deep queue read.
351 MB/s -8%
DQ Write
Peak 4K-64Thread Write Speed
286 MB/s +0% 285 MB/s -0%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
117 MB/s Much faster peak deep queue mixed IO.
82.6 MB/s -42%
ADQ Read
Avg. 4K-64Thread Read Speed
197 MB/s Slightly faster deep queue read.
181 MB/s -9%
ADQ Write
Avg. 4K-64Thread Write Speed
188 MB/s Slightly faster deep queue write.
177 MB/s -6%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
66.4 MB/s Much faster deep queue mixed IO.
46.9 MB/s -41%
29 Months Slightly more recent.
32.8 Months -13%
AS-SSD Total
AS-SSD Total Score
1,172 Pts Slightly stronger server IO.
1,105 Pts -6%
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) May 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

 Best User Rated

The Best.
Intel Core i7-7700K $309Nvidia GTX 1070 $368Samsung 850 Evo 250GB $102
Intel Core i5-7600K $240AMD RX 480 $210Samsung 850 Pro 256GB $127
AMD Ryzen 7 1700 $300Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $167
Seagate Barracuda 1TB (2016) $50Corsair Vengeance LPX DDR4 3000 C15 2x8GB $127SanDisk Extreme 64GB $33
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46Corsair Vengeance LPX DDR4 3200 C16 2x8GB $136SanDisk Ultra Fit 32GB $13
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