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

Controller: Marvell 88SS1074. Flash Memory: Micron 3D TLC.

Real World Speed
Performance profile from 20,172 user samples
14,029 User Benchmarks
Best Bench: 108% 238GB free
Worst Bench: 53% 32GB free
Poor: 53% Great: 108%
SPEED RANK: 158th / 853
6,143 User Benchmarks
Best Bench: 82% 211GB free
Worst Bench: 52% 87GB free
Poor: 52% Great: 82%
SPEED RANK: 332nd / 853
Effective Speed
Effective SSD Speed
82.3 % Faster effective speed.
69.4 % -19%
Avg. Sequential Read Speed
490 MB/s Slightly faster read speed.
466 MB/s -5%
Avg. Sequential Write Speed
342 MB/s Slightly faster write speed.
300 MB/s -14%
4K Read
Avg. 4K Random Read Speed
28.9 MB/s Faster random read.
23 MB/s -26%
4K Write
Avg. 4K Random Write Speed
77.8 MB/s Faster random write.
60.6 MB/s -28%
Avg. Sequential Mixed IO Speed
375 MB/s Faster mixed IO speed.
314 MB/s -19%
4K Mixed
Avg. 4K Random Mixed IO Speed
22.1 MB/s Faster random mixed IO.
17.3 MB/s -28%
Peak Sequential Read Speed
522 MB/s Slightly faster peak read speed.
484 MB/s -8%
Peak Sequential Write Speed
491 MB/s Much faster peak write speed.
338 MB/s -45%
4K Read
Peak 4K Random Read Speed
36.3 MB/s Much faster peak random read.
27.9 MB/s -30%
4K Write
Peak 4K Random Write Speed
117 MB/s Much faster peak random write.
85.9 MB/s -36%
Peak Sequential Mixed IO Speed
508 MB/s Much faster peak mixed IO speed.
339 MB/s -50%
4K Mixed
Peak 4K Random Mixed IO Speed
28.9 MB/s Faster peak random mixed IO.
24.5 MB/s -18%
Market Share
Based on 3,271,260 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.77 % Slightly higher market share.
0.73 % -5%
Value For Money
50.1 % -50% 75 % Much better value.
User Rating
UBM User Rating
64 % +2% 63 % -2%
Price (score)
$188 -50% $94 Much cheaper.
57 Months -77% 13 Months Much more recent.
DQ Read
Peak 4K-64Thread Read Speed
371 MB/s Much faster peak deep queue read.
230 MB/s -61%
DQ Write
Peak 4K-64Thread Write Speed
318 MB/s Much faster peak deep queue write.
221 MB/s -44%
AS-SSD Total
AS-SSD Total Score
1,190 Pts Much stronger server IO.
807 Pts -47%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
88.5 MB/s Hugely faster peak deep queue mixed IO.
40.2 MB/s -120%
ADQ Read
Avg. 4K-64Thread Read Speed
189 MB/s Much faster deep queue read.
130 MB/s -45%
ADQ Write
Avg. 4K-64Thread Write Speed
184 MB/s Faster deep queue write.
143 MB/s -29%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
52.8 MB/s Hugely faster deep queue mixed IO.
26.2 MB/s -102%
256GB 275GB

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]


The 275GB Crucial MX300 supersedes the MX200. Unlike its predecessor, the MX300 is TLC based and therefore suffers from weak write speeds in comparison to MLC drives. The MX300 utilises a sophisticated algorithm to enable fast burst write speeds provided that there is sufficient free space on the disk but as the drive fills up write performance drops to the relatively poor levels seen on other TLC drives (similar to mechanical drives). At current prices (70 USD) the MX300 competes well with other low end drives such as the OCZ Trion, Adata SP550 and Samsung 750 EVO. As stocks build the MX300 is likely to see further price cuts, so it could become a very interesting value proposition. See the current value leaders here[Sep '16 SSDrivePro]


Solid State Drive Rankings (Price vs Performance) July 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

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The Best.
Intel Core i7-7700K $295Nvidia GTX 1070 $390Samsung 850 Evo 250GB $97
AMD Ryzen 7 1700 $268AMD RX 480 $260Samsung 850 Pro 256GB $136
Intel Core i5-7600K $224Nvidia GTX 1060-6GB $239Samsung 850 Evo 500GB $165
Seagate Barracuda 1TB (2016) $50G.SKILL Trident Z DDR4 3200 C14 4x16GB $714SanDisk Extreme 64GB $34
Seagate Barracuda 3TB (2016) $83Corsair Vengeance LPX DDR4 3000 C15 2x8GB $132SanDisk Extreme 32GB $23
Seagate Barracuda 7200.14 1TB $44HyperX Fury DDR4 2133 C14 2x8GB $133SanDisk Ultra Fit 32GB $13
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