URGENT HELP REQUIRED Steam gift for resolution. Still an issue. updated. now inc video of issue.

CPU: AMD FX 8350 (stock no oc) // GPU: Gigabyte R9 390// RAM: 8GB Corsair Vengeance// Mobo: Gigabyte GA-970A-DS3P// PSU: Corsair CS650M Gold 650w // TWO SAMSUNG SSD HARD DRIVES & TOSHIBA 500GB MECH Encountered an issue one day last week where i could be gaming or just browsing the internet and the screen would just go black, no error messages, no beeps, sometimes an audible grinding/screeching noise via speakers. Only resolution was to reboot. I RMA'd everything including cpu,mobo,psu,gpu, (not ram or hdd) and the problem still occurs I have updated my bios, ive updated audio drivers, graphic drivers, lan drivers, Operating temperatures are safe and normal I've wiped my ssd's and reinstalled windows 8 I've rewiped my ssd's and installed windows 10 I've wiped ssd's and tried OS on Mech HDD. Memtest done for 6 hours. no errors. If I do not reboot and leave the pc with a black screen the gpu will get very very hot and the fans will spin insanely fast. I'm at a complete loss here maybe someone here can help? https://www.youtube.com/watch?v=G14IHSE-UfM