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Graphics processing units or GPUs are specialized hardware for the manipulation of images and calculation of local image properties.

The mathematical basis of neural networks and image manipulation are similar, parallel tasks involving matrices, leading GPUs to become increasingly used for machine learning tasks. As of 2016, GPUs are popular for AI work, and they continue to evolve in a direction to facilitate deep learning, both for training[24] and inference in devices such as self-driving cars. GPU developers are developing additional connective capability for the kind of dataflow workloads AI benefits from. As GPUs have been increasingly applied to AI acceleration, GPU manufacturers have incorporated neural network specific hardware to further accelerate these tasks. Tensor cores are intended to speed up the training of neural networks. Wikipedia Reference