When a chip (CPU, GPU, or SoC) reaches a temperature limit, it will reduce frequency to cut heat and temperature. Using a technique known as "CPU throttling" in computer architecture, a mobile device automatically adjusts the frequency of a microprocessor either to conserve power or to reduce the amount of heat generated by the chip.
The recently released GFXBench 3.0 (shown above) illustrates that PowerVR GPUs (both PowerVR SGX GPU and PowerVR Rogue GPU) continuously maintain high-level performance even in the 30th run -- which is equivalent to a smartphone user running graphics-intensive applications, such as game or navigation, on a mobile device for 15 to 20 minutes.
In contrast, the competitor's GPUs get too hot after a while, forcing performance to drop 20 to 30 percent. After all the pixels are drawn and everything is rendered, maintaining continuous performance is important. That's when power-efficient architecture matters, says Imagination.
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