Futuremark PCMark 7
The popular PCMark 7 contains an individual disk subsystem benchmark. It is not a synthetic test, but is based on real-life applications. This benchmark reproduces typical disk usage scenarios and measures how fast they are completed in popular tasks. Starting with version 1.4.0, the PCMark 7 disk subsystem test generates raw performance results which do not take into account any pauses in the requests queue. New results are thus incompatible with old ones, but the differences between the performance numbers of different SSDs have now become more obvious. That’s why we decided to switch to the new version of the test from now on.
We ran PCMark 7 on “steady” SSDs, which is what they are going to be in actual computer systems most of the time. Their performance in this case is affected not only by their controller or flash memory speed but also by the efficiency of their internal algorithms that fight performance degradation.
The Samsung 840 Pro is the first SSD to beat SandForce-based products in PCMark 7, this benchmark being very favorable to the SandForce controller. It is an important victory that proves how powerful Samsung’s new SSD platform is. The Samsung 840 with TLC flash is, on the contrary, at the bottom of the diagram, even losing to its 830 series predecessor.
Let’s figure out what happened. The total PCMark 7 score is a more generalized performance metric. We will check out the individual tests to get a more detailed picture of what our SSDs are capable of under various types of operational load:
The Samsung 840 Pro proves its premium class again. It takes the lead in the most important usage scenarios and only falls behind its opponents when it comes to processing small multimedia files. The basic Samsung 840 behaves in the same way but has lower speed due to its TLC NAND flash. Thus, the poor overall score of this SSD is determined by its low performance with audio and image files. When it comes to the system scenarios or to processing large files, the Samsung 840 is quite an average product in performance, comparable even to the OCZ Vector or the Corsair Neutron GTX.