What is the GPU, and why is it important?
The question that a lot of smartphone buyers don’t usually think of, but one that is very important to your device’s performance. This is meant to be an informative introduction to GPUs in mobile devices, how to determine whether yours is any good, and why they are important in modern devices at all.
The GPU is a specialized circuit that focuses on generating images for a device to display. Every modern mobile device has some form of a GPU to aid in generating images and computer graphics and is an essential part of every smart phone. Without it, high-performance games and elaborate user interface elements just wouldn’t be possible without seriously taxing your device’s CPU and battery.
The GPU works by rapidly manipulating the memory of a device to quickly and efficiently create images in a frame buffer, or a portion of RAM essentially dedicated to image processing, to output on a display. The GPU is also much better at processing large portions of data in parallel than a CPU and allows the CPU to work less to produce detailed computer graphics.
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The GPU is something of an afterthought to most people when it comes to buying a mobile device. Many associate the GPU as a computer thing, with high-end graphics cards being an integral part of gaming PCs and high-powered workstations for decades now. However, mobile devices like your smartphone also contain a GPU as part of the chipset and are used just as often as a desktop grade GPU. Popular phone GPUs are Qualcomm’s Adreno series, the PowerVR series found in Apple phones, and the Nvidia Tegra line. Odds are, one of those three are in your tablet or phone right now.
The GPU of your device can also be measured in efficiency and power consumption, based on the size of the chip fabrication process.
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