Screen goes black and flashes HDMI then Analog, loose signal

Hey guys
I really need help because i am going crazy. During a game, or a movie, or watching youtube, my screen goes black( looses signal) and i have to restart the whole PC to make it work but it keeps on happening. I changed the hdmi cable and still the same **** happens. I checked the drivers and everything is fine. Please help

Well like this is happening for 2 weeks, it has been more frequent theese past few days. I change the HDMI cable but it was the same, no improvment and now when i turn the regular game i play, the fps from the normal number goes down and then the screen turns off. Some times it even goes down when i was watching something on youtube or an already downloaded movie it turned off. But lately only when i turn on my usual game i play.
I defragmented the discs but nothing, checked the drivers ( all up to date )


Here are the specs