alt Hacker NewsThere's definitely a few reasons but one of them is that you have to ask the GPU to do ~60x less work when you render 60x less frames
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Filligree • today at 12:05 AM
Why? Surely copying the same pixels out sixty times doesn't take that much power?
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PSR (panel self-refresh) lets you send a single frame from software and tell the display to keep using that.
You don’t need to render 60 times the same frame in software just to keep that visible on screen.