Real World Speed
Performance profile from 12,914 user samples
12,914 User Benchmarks
Best Bench: 107% 218GB free
Worst Bench: 56% 1GB free
Poor: 56% Great: 107%
SPEED RANK: 140th / 850
Effective Speed
Effective SSD Speed
83.4 % +1% 82.3 % -1%
Avg. Sequential Read Speed
490 MB/s +1% 485 MB/s -1%
Avg. Sequential Write Speed
352 MB/s -3% 364 MB/s +3%
4K Read
Avg. 4K Random Read Speed
28.9 MB/s -2% 29.6 MB/s +2%
4K Write
Avg. 4K Random Write Speed
78.8 MB/s Slightly faster random write.
69.8 MB/s -13%
Avg. Sequential Mixed IO Speed
383 MB/s +3% 374 MB/s -3%
4K Mixed
Avg. 4K Random Mixed IO Speed
22.3 MB/s -0% 22.4 MB/s +0%
Peak Sequential Read Speed
524 MB/s +2% 515 MB/s -2%
Peak Sequential Write Speed
495 MB/s Faster peak write speed.
426 MB/s -16%
4K Read
Peak 4K Random Read Speed
36.6 MB/s -3% 37.6 MB/s +3%
4K Write
Peak 4K Random Write Speed
118 MB/s Slightly faster peak random write.
104 MB/s -14%
Peak Sequential Mixed IO Speed
508 MB/s Faster peak mixed IO speed.
430 MB/s -18%
4K Mixed
Peak 4K Random Mixed IO Speed
29.3 MB/s -6% 31.1 MB/s Slightly faster peak random mixed IO.
Market Share
Based on 2,813,985 SSDs tested.
User Rating
UBM User Rating
64 % -15% 73.8 % More popular.
Market Share
Market Share (trailing 30 days)
0.87 % -109% 1.82 % Hugely higher market share.
Price (score)
$224 -71% 131 USD Much cheaper.
Value For Money
44.5 % -52% 67.6 % Much better value.
DQ Read
Peak 4K-64Thread Read Speed
375 MB/s Slightly faster peak deep queue read.
351 MB/s -7%
DQ Write
Peak 4K-64Thread Write Speed
322 MB/s Slightly faster peak deep queue write.
285 MB/s -13%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
90.7 MB/s Slightly faster peak deep queue mixed IO.
82.6 MB/s -10%
ADQ Read
Avg. 4K-64Thread Read Speed
194 MB/s Slightly faster deep queue read.
180 MB/s -8%
ADQ Write
Avg. 4K-64Thread Write Speed
188 MB/s Slightly faster deep queue write.
176 MB/s -7%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
53.2 MB/s Slightly faster deep queue mixed IO.
47 MB/s -13%
55 Months -68% 32.8 Months Much more recent.
AS-SSD Total
AS-SSD Total Score
1,202 Pts Slightly stronger server IO.
1,106 Pts -9%
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) 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 $98
AMD Ryzen 7 1700 $300AMD RX 480 $210Samsung 850 Pro 256GB $138
Intel Core i5-7600K $240Nvidia 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) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $700SanDisk Extreme 32GB $22
Seagate Barracuda 7200.14 1TB $46Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $13
Today's hottest deals
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback