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Is this a myth or is this for real?

I read about it all and was wondering if anyone knows if it is true or tried it yet.

Going from 60Hz to 40Hz

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There are plenty of reports around of it having a positive effect, but that also included switching to 16bit color as well - not just refresh. –  nerdwaller May 23 '13 at 14:12
    
Based on intuition, I'd say that the amount of power the screen uses over any given time unit would remain the same. I say this because lowering the refresh rate, would result in each picture/frame being showed for a longer time period. However, it could be that the less frequent redrawing of the screen would result in a lower power consumption. That would be my best educated guess, but I'm by no means an expert on the subject. –  AcId May 23 '13 at 14:17

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Well, if you do not mind my eyes, it's true. Energy saving graphics card and monitor increases. But the device that consumes considerably more power - the CPU. Just do not think that the overall percentage of energy savings will be large. Extra battery is much cheaper than eye problems, I think). Good luck.

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