Duplicate screen with 120 Hz monitor and 60 Hz TV

Feb 5, 2019
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Hello everyone. I have a 120 Hz monitor connected to displayport and 60 Hz TV connected to an Hdmi port of my graphic card. When I want to play games I plug in my controller, duplicate the screen, turn off the monitor and walk around the corner to my TV. So far so good. I am just curios that windows and even game options select 120 Hz as a refresh rate even if my TV only supports 60 Hz. As far as I understand my TV receives 120 Hz signals then. Is this an issue regarding picture quality or performance? Should I set 60 Hz instead if I duplicate my screens? Regards