Help can't identify what's causing my pc to shut of randomly

[warm sage]

My Display, keyboard and mouse lost power randomly like after a shutdown but the pc was sill on (the fans were running)
I checked event viewer and it showed this

and after i restarted the pc got this pop-up

i also got some artifacts in mid december but they were fixed after a re-boot

now im not sure if its the GPU or the PSU