lenovo y720 screen overclocking

[spartaks2000]

so i tried to overclock my lenovos y720 screen to higer refresh rate first tried 75hz the screen turn black and with lines okay restarted pc(back to 60hz) tried 63 hz and then was somehting silimar but saw some compressed screen, im just wondering is this some softare bug or i just cant overclock it, in the video tutorial i followed many did overclokc to hight hz their laptops but i cannot do it on mine, i want to hear your opinion

 

[jaslion]

so i tried to overclock my lenovos y720 screen to higer refresh rate first tried 75hz the screen turn black and with lines okay restarted pc(back to 60hz) tried 63 hz and then was somehting silimar but saw some compressed screen, im just wondering is this some softare bug or i just cant overclock it, in the video tutorial i followed many did overclokc to hight hz their laptops but i cannot do it on mine, i want to hear your opinion

This display is not meant to run at anything higher than 60hz. Also on a laptop it's quite dangerous to do this due to how most limit the power delivery. Yours simply cannot be overclocked and even if it could you really shouldn't.