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 1999 user samples
1746 User Benchmarks:
Best Score: 133% 160GB free
Worst Score: 32% 61GB free
Worst: 32% Best: 133%
SPEED RANK: 71st / 552
253 User Benchmarks:
Best Score: 134% 207GB free
Worst Score: 45% 182GB free
Worst: 45% Best: 134%
SPEED RANK: 44th / 552
Avg. Sequential Read Speed
478 MB/s +5% 456 MB/s -5%
Avg. Sequential Write Speed
340 MB/s -16% 396 MB/s Faster write speed.
4K Read?
Avg. 4K Random Read Speed
34.6 MB/s Much faster random read.
26.2 MB/s -32%
4K Write?
Avg. 4K Random Write Speed
55.9 MB/s -47% 82.1 MB/s Much faster random write.
Avg. Sequential Mixed IO Speed
314 MB/s -20% 376 MB/s Faster mixed IO speed.
4K Mixed
Avg. 4K Random Mixed IO Speed
19.3 MB/s -32% 25.5 MB/s Much faster random mixed IO.
Peak Sequential Read Speed
510 MB/s +0% 509 MB/s -0%
Peak Sequential Write Speed
377 MB/s -28% 484 MB/s Faster peak write speed.
4K Read?
Peak 4K Random Read Speed
45.6 MB/s Much faster peak random read.
33.9 MB/s -35%
4K Write?
Peak 4K Random Write Speed
90.2 MB/s -46% 132 MB/s Much faster peak random write.
Peak Sequential Mixed IO Speed
356 MB/s -22% 434 MB/s Faster peak mixed IO speed.
4K Mixed
Peak 4K Random Mixed IO Speed
26.6 MB/s -41% 37.4 MB/s Much faster peak random mixed IO.
Value For Money
88.9 % Better value.
72.6 % -22%
User Rating?
UBM User Rating
76 % Slightly more popular.
67 % -13%
Price (score)
$138 Much cheaper.
$256 -46%
Effective Speed?
Effective SSD Speed
440 MB/s -9% 477 MB/s Slightly faster effective speed.
17 Months Much more recent.
32 Months -47%
DQ Read?
Peak 4K-64Thread Read Speed
369 MB/s Slightly faster peak deep queue read.
337 MB/s -9%
DQ Write?
Peak 4K-64Thread Write Speed
259 MB/s -26% 327 MB/s Faster peak deep queue write.
AS-SSD Total?
AS-SSD Total Score
1,101 Pts -5% 1,156 Pts +5%
DQ Mixed
Peak 4K-64Thread Mixed IO Speed
83.2 MB/s -51% 126 MB/s Much faster peak deep queue mixed IO.
ADQ Read?
Avg. 4K-64Thread Read Speed
193 MB/s +1% 192 MB/s -1%
ADQ Write?
Avg. 4K-64Thread Write Speed
156 MB/s -35% 210 MB/s Much faster deep queue write.
ADQ Mixed
Avg. 4K-64Thread Mixed IO Speed
49.4 MB/s -60% 79.2 MB/s Much 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 consists 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 439 MB/s the EVO is however, within reach of the two speed leaders (Vector and 850 Pro). At a price point of $130 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 winner but the Sandisk may be a viable alternative thanks to its cache-free, and therefore more consistent performance during extended writes. [Aug '14 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

December 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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