Question why does my screen go black but computer stays on

Jan 1, 2020
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Sometimes when i am gaming my screen will go black and it says there is no signal and the monitor enters power saving mode. the computer is still on as i can hear the music playing and fans spinning and lighting up. This inst very frequent but is still very annoying to deal with .
I have a rx5700xt red devil and it is usually under utilised as it only runs at 50%.
Any help on my problems would be appreciated.