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


Controller: OCZ Barefoot 3 M00. Flash: Toshiba 19nm (1st gen) MLC NAND.

Real World Speed
Performance profile from 13,954 user samples
13,391 User Benchmarks
Best Bench: 107% 218GB free
Worst Bench: 55% 1GB free
Poor: 55% Great: 107%
SPEED RANK: 133rd / 850
563 User Benchmarks
Best Bench: 114% 176GB free
Worst Bench: 64% 9GB free
Poor: 64% Great: 114%
SPEED RANK: 87th / 850
Effective Speed
Effective SSD Speed
83.8 % -6% 89.1 % Slightly faster effective speed.
Avg. Sequential Read Speed
490 MB/s +1% 486 MB/s -1%
Avg. Sequential Write Speed
355 MB/s -25% 444 MB/s Faster write speed.
4K Read
Avg. 4K Random Read Speed
29 MB/s Much faster random read.
21.6 MB/s -34%
4K Write
Avg. 4K Random Write Speed
78.8 MB/s -8% 84.8 MB/s Slightly faster random write.
Avg. Sequential Mixed IO Speed
387 MB/s -19% 462 MB/s Faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
22.4 MB/s -17% 26.2 MB/s Faster random mixed IO.
Peak Sequential Read Speed
524 MB/s +1% 521 MB/s -1%
Peak Sequential Write Speed
497 MB/s -1% 502 MB/s +1%
4K Read
Peak 4K Random Read Speed
36.6 MB/s Much faster peak random read.
27 MB/s -36%
4K Write
Peak 4K Random Write Speed
119 MB/s -10% 131 MB/s Slightly faster peak random write.
Peak Sequential Mixed IO Speed
509 MB/s +0% 508 MB/s -0%
4K Mixed
Peak 4K Random Mixed IO Speed
29.3 MB/s -33% 39 MB/s Much faster peak random mixed IO.
Market Share
Based on 2,844,715 SSDs tested.
Market Share
Market Share (trailing 30 days)
0.8 % Insanely higher market share.
0.05 % -1,500%
Value For Money
43.2 % +2% 42.3 % -2%
User Rating
UBM User Rating
64 % +5% 61 % -5%
Price (score)
$235 +4% $246 -4%
55 Months -24% 42 Months More recent.
DQ Read
Peak 4K-64Thread Read Speed
377 MB/s +3% 365 MB/s -3%
DQ Write
Peak 4K-64Thread Write Speed
322 MB/s -8% 349 MB/s Slightly faster peak deep queue write.
AS-SSD Total
AS-SSD Total Score
1,207 Pts -0% 1,209 Pts +0%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
91.2 MB/s -10% 99.9 MB/s Slightly faster peak deep queue mixed IO.
ADQ Read
Avg. 4K-64Thread Read Speed
200 MB/s +3% 195 MB/s -3%
ADQ Write
Avg. 4K-64Thread Write Speed
190 MB/s -8% 206 MB/s Slightly faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
54.7 MB/s -12% 61.2 MB/s Slightly faster deep queue mixed IO.
256GB 240GB

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]


Comparing the 150 to the original Vector is disappointing, the newer 150 actually offers marginally worse performance than its predecessor. A strange result but verified (at least partly) by figures on OCZ's own website: 100K 4K read IOPS for the Vector vs 90K 4K read IOPS for the 150. The newer 150 comes with a 5 year warranty which covers 50GB/day vs. the original Vectors 20GB/day but even this should be taken with a pinch of salt considering that the OCZ stock price is currently trading at around seven cents per share, an all time low. Despite the fact that new Vector 150 performs worse than its predecessor it's still a very competent performer and if prices drop, it has the potential to become a decent value proposition. In the meantime however there are far better deals available elsewhere.  [Dec '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

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Intel Core i7-7700K $309Nvidia GTX 1070 $368Samsung 850 Evo 250GB $98
Intel Core i5-7600K $240AMD RX 480 $220Samsung 850 Pro 256GB $129
AMD Ryzen 7 1700 $300Nvidia GTX 1060-6GB $230Samsung 850 Evo 500GB $156
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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