Samsung has offered an official statement on this issue. According to this, the maximum frequency of 533 MHz GPU Full Screen is used for applications that require maximum power of their hardware, but is limited to 480 MHz for demanding applications such as games. The list of tests specified in the source code is used for products considered safe to run at maximum frequency. These explanations are consistent with what was found and our assumptions, but the idea of using this mode gives rise to anomalies and the occurrence of differences in performance between two different versions of a test that actually use the same code. Perhaps the best idea would be the complete elimination of this optimization or providing a maximum rate control options.Performance test results are not always a real indicator of performance tested products, but they offer concrete and repeatable results that are the only way for an objective comparison. Because of this importance, they were sometimes abused by hardware manufacturers who have tried to obtain higher scores than normal. After the video card drivers and modified routers with firmware optimized for testing mobile phones turn came.
Using a higher frequency than the nominal is not new, some modern processors and graphics chips with a higher Turbo frequency that can be achieved when the necessary resources are increased and temperatures allows silicon chip. According to the analysis made by Anandtech, but the case is different. Although, as stated by the manufacturer, Bench GFX GL Benchmark 2.5.1 and 2.7 use the same code for 3D tests, only the first of them started increasing the frequency to 532 MHz, while the second run at 480 MHz only.
Discovery originally started Beyond3D forum, where a user noted that the maximum frequency of the chip GPU Exynos 5 Octa (Exynos 5410), which is implemented in some models of the Samsung Galaxy S 4 gets a speed increase of about 11 points only during certain tests. Normally, PowerVR SGX544MP3 GPU is clocked at a maximum frequency of 480 MHz, it can be verified by an order of the Android Debug Bridge. During running some tests, but it goes to 532 MHz, providing a speed increase to be reflected in test results.
As specified Imagination Technologies PowerVR SGX544 maximum frequency and SGX545 chip is 532 MHz and it has been used without problems and solution Intel Atom Z2670. From this point of view, Samsung's not be criticized for anything serious GPU running on parameters set by the manufacturer and can not be considered as dangerous frequencies supratactat the physical integrity of the phone. This mode is only available for Galaxy S phones based on chip Exynos 4 5 Octa, which are very rare in Romania, model 600 sold locally using the Qualcomm Snapdragon solution incorporating a different graphics core.
Most likely, Samsung has chosen frequency of 480 MHz for reasons of consumption and heat dissipation, the chip is still very strong at this level. Tactării choice of the higher frequencies that can not be achieved but only if running certain software applications is a decision that Samsung will have to uphold.
Maybe all entries are just a primitive method TwDVFSApp.apk activation peak frequencies for applications that are not intercepted by the automated module mentioned above, however, that maximum performance is achieved only in some tests will give buyers the impression that Samsung tried to cheat. Or can we even attempt to make the book cheating, as they tried in the past and manufacturers of video cards. How will choose Samsung to fix this image problem we see in the days ahead.
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