Black screen/crash?

[Nik_]

Basically my screen goes black and says "entering power saving mode." and never comes back. So I restart my pc and go back to playing whatever, in this case warframe, not too long later it does it again, repeat, third time it does a disk check or something. Not clue whats wrong. Am I over working it with a bunch of chrome tabs, open streams, and warframe on high? Is one of my HDDs broken/breaking?

 

Usually a very rare thing but today it's been bad. I can't remember if it happened yesterday and I have to assume it's at least partly due to warframe, being that I started playing again yesterday afternoon. 

 

Thanks. 

 

EDIT: when my screen goes black everything, for at least a few seconds still functions, I hear audio, can talk on discord, etc. 

 

OS: win 7

CPU: i5 4430

mobo: z97 anniversary 

ram: ripjaws 2x4 1600 & random chinese 2x4 1600

HDD: WD blue 1tb(main), seagate 1tb, seagate 500gb

gpu: asus rx 470

PSU: Thermaltake Smart 80+ White Series 500W 80 Plus Power Supply