eli5 Why does GPU heats and use fan to cooldown while processing 8k video on PC and there is no single fan in a TV and still process 8k/4k videos?

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In short, why does the the TV doesn’t need a fan to cooldown and PC requires one while dealing with high definition videos?

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ELI5: If you ask an artist to draw a picture for you, it’s going to take a lot of effort and time. If you ask a photographer to show you the picture their camera just took (assuming digital camera), it’s going to be easy and only take as long as they take to pull the image up.

TVs only show you pictures that were already drawn, GPUs draw those pictures from scratch before showing it to you. To do this fast (because you want a moving video not a slideshow), they need a LOT of power. TVs can show you images pretty fast without using much power at all.
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