Controller: Samsung 3 Core MEX. Memory: Samsung 19nm Toggle Mode TLC.

Controller: Indilinx Everest 2 IDX400M00-BC. Flash Memory: Intel Synchronous 25nm MLC.

Real World Speed
Performance profile from 907 user samples
785 User Benchmarks:
Best Score: 131% 40GB free
Worst Score: 17% 164GB free
Worst: 17% Best: 131%
SPEED RANK: 30th / 447
122 User Benchmarks:
Best Score: 117% 83GB free
Worst Score: 31% 100GB free
Worst: 31% Best: 117%
SPEED RANK: 41st / 447
Avg. Sequential Read Speed
430 MB/s +2% 420 MB/s -2%
Avg. Sequential Write Speed
402 MB/s Slightly faster write speed.
370 MB/s -9%
4K Read?
Avg. 4K Random Read Speed
33 MB/s Much faster random read.
25.3 MB/s -30%
4K Write?
Avg. 4K Random Write Speed
64.9 MB/s -14% 74.1 MB/s Slightly faster random write.
Avg. Sequential Mixed IO Speed
399 MB/s Slightly faster mixed IO speed.
348 MB/s -15%
4K Mixed
Avg. 4K Random Mixed IO Speed
26.6 MB/s Slightly faster random mixed IO.
24.7 MB/s -8%
Peak Sequential Read Speed
519 MB/s +3% 505 MB/s -3%
Peak Sequential Write Speed
502 MB/s Slightly faster peak write speed.
478 MB/s -5%
4K Read?
Peak 4K Random Read Speed
45.2 MB/s Much faster peak random read.
33.4 MB/s -35%
4K Write?
Peak 4K Random Write Speed
113 MB/s -12% 127 MB/s Slightly faster peak random write.
Peak Sequential Mixed IO Speed
508 MB/s Faster peak mixed IO speed.
432 MB/s -18%
4K Mixed
Peak 4K Random Mixed IO Speed
36.4 MB/s Slightly faster peak random mixed IO.
34 MB/s -7%
Value For Money
100 % Better value.
82.2 % -22%
User Rating?
UBM User Rating
92 % Much more popular.
64 % -44%
Price (score)
$140 Cheaper.
$190 -26%
Effective Speed?
Effective SSD Speed
589 MB/s Slightly faster effective speed.
549 MB/s -7%
12 Months Much more recent.
27 Months -56%
DQ Read?
Peak 4K-64Thread Read Speed
373 MB/s Slightly faster peak deep queue read.
329 MB/s -13%
DQ Write?
Peak 4K-64Thread Write Speed
343 MB/s +5% 327 MB/s -5%
AS-SSD Total?
AS-SSD Total Score
1,233 Pts Slightly stronger server IO.
1,136 Pts -8%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
117 MB/s -5% 123 MB/s Slightly faster peak deep queue mixed IO.
ADQ Read?
Avg. 4K-64Thread Read Speed
187 MB/s -2% 191 MB/s +2%
ADQ Write?
Avg. 4K-64Thread Write Speed
191 MB/s -5% 200 MB/s +5%
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
69.8 MB/s -17% 81.5 MB/s Faster deep queue mixed IO.
250GB 256GB

The Evo is remarkable in that, like the Sandisk Extreme II, it features a second level cache. For the 250 GB Evo this comprises of a 3 GB Turbowrite cache (TWC) which is a block of high speed Flash Memory. When the TWC is exhausted write speeds drop by approximately 50% but that won't often happen under typical consumer workloads. In terms of raw performance, even with its cache, the Evo still isn't the fastest drive. With a real world speed index reading of 551 MB/s the EVO is however, within 5% of the two speed leaders (Vector and 840 Pro). At a price point of £100 the Evo is around 30% cheaper making it the best value for money SSDs I have seen in 2014. Comparing the Evo and the Sandisk Ultra Plus shows that the Evo is the clear winner but the Sandisk may be a viable alternative thanks to its cache-free, and therefore more consistent performance during extended writes. [Aug '13 SSDrivePro]


The Vertex 4 is just over a year old but thanks to its recent firmware update (1.5), it still manages to perform almost on a par with the best drives currently available. One of the striking aspects of the Vertex is its well-rounded performance profile. With an AS-SSD score of 1137 and a real world speed of 548 the Vertex 4 is able to cope extremely well with both server and consumer type workloads. This drive uses the new Indilux Everest 2 controller, which unlike the previous generations of this drive which used a SandForce controller, is able to cope admirably with both compressible and incompressible data. Overall, the Vertex 4 is a great performing SSD that said, there are better value for money (and younger) drives available, including the Vertex 4's own successor, the OCZ Vector[Jun '13 SSDrivePro]


Solid State Drive User Rankings Chart

July 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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Best User Rated
SanDisk Extreme USB 3.0 16GBSamsung 840 Evo 250GBIntel Core i5-3570KSeagate Barracuda 7200.14 3TBAMD R9 280X
SanDisk Extreme USB 3.0 32GBSamsung 840 Pro 256GBAMD FX-8350Seagate Barracuda 7200.14 1TBAMD R9 270X
Kingston DataTraveler 100 G3 USB 3.0 16GBSamsung 840 Evo 120GBIntel Core i5-4670KWD Black 1TB (2013)Nvidia GTX 780 Ti
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