Controller: Phison PS3110-S10. NAND Flash: Toshiba 19nm MLC.

Controller: Samsung 3-core MDX. Flash Memory: Samsung 21nm Toggle Mode MLC.

Real World Speed
Performance profile from 19,570 user samples
639 User Benchmarks
Best Bench: 103% 89GB free
Worst Bench: 55% 198GB free
Poor: 55% Great: 103%
SPEED RANK: 175th / 873
18,931 User Benchmarks
Best Bench: 105% 116GB free
Worst Bench: 56% 100GB free
Poor: 56% Great: 105%
SPEED RANK: 157th / 873
Effective Speed
Effective SSD Speed
81.9 % -2% 83.4 % +2%
Avg. Sequential Read Speed
494 MB/s +1% 491 MB/s -1%
Avg. Sequential Write Speed
421 MB/s Faster write speed.
356 MB/s -18%
4K Read
Avg. 4K Random Read Speed
28.4 MB/s -1% 28.7 MB/s +1%
4K Write
Avg. 4K Random Write Speed
72.3 MB/s -8% 78 MB/s Slightly faster random write.
Avg. Sequential Mixed IO Speed
446 MB/s Slightly faster mixed IO speed.
392 MB/s -14%
4K Mixed
Avg. 4K Random Mixed IO Speed
13.5 MB/s -64% 22.1 MB/s Much faster random mixed IO.
Peak Sequential Read Speed
527 MB/s +1% 524 MB/s -1%
Peak Sequential Write Speed
509 MB/s +3% 492 MB/s -3%
4K Read
Peak 4K Random Read Speed
36.9 MB/s +3% 35.9 MB/s -3%
4K Write
Peak 4K Random Write Speed
115 MB/s +4% 111 MB/s -4%
Peak Sequential Mixed IO Speed
514 MB/s +1% 508 MB/s -1%
4K Mixed
Peak 4K Random Mixed IO Speed
16 MB/s -78% 28.5 MB/s Much faster peak random mixed IO.
Market Share
Based on 5,201,195 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.02 % -2,300% 0.48 % Insanely higher market share.
Value For Money
51.2 % Much better value.
35.3 % -45%
User Rating
UBM User Rating
62 % -2% 63 % +2%
Price (score)
$170 Much cheaper.
$305 -44%
37 Months Much more recent.
63 Months -41%
DQ Read
Peak 4K-64Thread Read Speed
360 MB/s -4% 373 MB/s +4%
DQ Write
Peak 4K-64Thread Write Speed
344 MB/s Slightly faster peak deep queue write.
316 MB/s -9%
AS-SSD Total
AS-SSD Total Score
1,202 Pts +1% 1,184 Pts -1%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
63.4 MB/s -43% 90.8 MB/s Much faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
162 MB/s -23% 200 MB/s Faster deep queue read.
ADQ Write
Avg. 4K-64Thread Write Speed
203 MB/s Slightly faster deep queue write.
184 MB/s -10%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
21.8 MB/s -153% 55.1 MB/s Hugely faster deep queue mixed IO.
240GB 256GB

The 840 Pro is stunning. Samsung have created a completely in-house package including both the controller and their own new 21nm toggle mode NAND. On release (Oct '12) this was the fastest performing deep queue depth consumer grade SSD available. Fast forward six months (Apr '13) and the 840 Pro still holds both the random read/write deep queue depth speed records of 384 MB/s and 326 MB/s, impressive considering how fast the SSD space tends to move. There are no obvious weaknesses, in-fact the 840 pro takes first place in nearly all of the speed categories and is only seriously rivalled by one drive, the OCZ Vector. To conclude, in terms of both outright performance, particularly server orientated, and value for money the 256GB and 128GB 840 Pros are amongst the top handful of drives currently available. [Jun '13 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 $87
AMD Ryzen 7 1700 $270Nvidia 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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