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

Controller: Indilinx Barefoot 3 IDX500M00-BC. Flash: Toshiba 19nm (1st gen) MLC NAND.

Real World Speed
Performance profile from 257 user samples
Worst: 20% Best: 118%
SPEED RANK: 54th / 682
Worst: 42% Best: 95%
SPEED RANK: 92nd / 682
Avg. Sequential Read Speed
448 MB/s -2% 458 MB/s +2%
Avg. Sequential Write Speed
370 MB/s -16% 429 MB/s Faster write speed.
4K Read?
Avg. 4K Random Read Speed
27.5 MB/s Much faster random read.
19.2 MB/s -43%
4K Write?
Avg. 4K Random Write Speed
66 MB/s -8% 71 MB/s Slightly faster random write.
Avg. Sequential Mixed IO Speed
383 MB/s -15% 441 MB/s Faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
21.7 MB/s +2% 21.3 MB/s -2%
Peak Sequential Read Speed
524 MB/s +1% 519 MB/s -1%
Peak Sequential Write Speed
505 MB/s +1% 499 MB/s -1%
4K Read?
Peak 4K Random Read Speed
38 MB/s Much faster peak random read.
25 MB/s -52%
4K Write?
Peak 4K Random Write Speed
124 MB/s +4% 119 MB/s -4%
Peak Sequential Mixed IO Speed
507 MB/s +0% 505 MB/s -0%
4K Mixed
Peak 4K Random Mixed IO Speed
27.8 MB/s -31% 36.4 MB/s Much faster peak random mixed IO.
Value For Money
83 % Better value.
66.1 % -25%
User Rating?
UBM User Rating
88 % More popular.
71 % -24%
Price (score)
158 GBP Slightly cheaper.
170 GBP -7%
Effective Speed?
Effective SSD Speed
579 MB/s Slightly faster effective speed.
529 MB/s -9%
18 Months -72% 5 Months Much more recent.
DQ Read?
Peak 4K-64Thread Read Speed
384 MB/s Slightly faster peak deep queue read.
343 MB/s -12%
DQ Write?
Peak 4K-64Thread Write Speed
326 MB/s -2% 331 MB/s +2%
AS-SSD Read?
AS-SSD Read Score
475 Pts Slightly stronger server read.
420 Pts -13%
AS-SSD Write?
AS-SSD Write Score
501 Pts 0% 501 Pts 0%
AS-SSD Total?
AS-SSD Total Score
1,232 Pts Slightly stronger server IO.
1,143 Pts -8%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
90 MB/s Slightly faster peak deep queue mixed IO.
84 MB/s -7%
ADQ Read?
Avg. 4K-64Thread Read Speed
226 MB/s Hugely faster deep queue read.
91.7 MB/s -146%
ADQ Write?
Avg. 4K-64Thread Write Speed
201 MB/s -3% 207 MB/s +3%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
59.1 MB/s Much faster deep queue mixed IO.
43.9 MB/s -35%
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 User Rankings Chart

April 2014 SSD Rankings

Welcome to our consumer SSD comparison. We calculate effective speed which measures performance for typical consumers. Effective speed is adjusted 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. Vote to share your opinion. [SSDrivePro]

Group Test Results

How Fast Is Your SSD?

Size up your PC in less than a minute.

Welcome to our free PC speed test tool. UserBenchMark will compare the strengths and weaknesses of each component in your PC to the ten most popular components in its class.

How it works

  • - Download and run UserBenchMark (UBM)
  • - Checks include: 4k Align, NCQ, TRIM, SATA, USB & S.M.A.R.T.
  • - Drive benchmarks include: read, write and mixed IO.
  • - CPU benchmarks include: integer, floating and string.
  • - GPU benchmarks include: DX9 and DX10 3D performance.
  • - 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
  • - Share your opinion by voting

Frequently Asked Questions

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