A Graphic Processing Unit (GPU) is a specialized processor dedicated to the creation of the images visualized on the screen. It implements a set of the most frequently used graphics primitive operations, so as the CPU is not involved in the time-expensive graphical computation. GPUs, originally designed for personal computers, are currently used in many other kinds of devices, such as mobile phones, games consoles, tablets, or embedded systems. In a PC a GPU can be included as a standalone graphic card (usually in the mid-high-level solutions) or embedded in the motherboard (in low-level models). Finally, at the end of 2010, CPUs with integrated GPU were released: a solution particularly efficient to reduce communication times among the processors and to limit battery consumption in mobile devices (as notebooks or netbooks).