PC Restarts while playing warframe.

[JoeStarzTT]

Good day, 

I have been having this issue for a few months now, when i am playing Warframe (usually during a mission) My Computer shuts off completely and restarts without warning or error message. 
It usually lasts about an 1 hour or 2 before this happens. I originally thought it was an overheating issue, but I've cleaned out my PC and run tests to see if anything was over heating, but everything was running fine. I thought maybe it was a hardware issue but, the thing is, I play other games just fine. I can play 20+hrs of Apex Legends, Overwatch, GTA 5, and any other triple A games without issue. But Warframe, crashes the entire PC. 

There was one instance where I found a "fix" online where it could be overclocking. I never did any overclocking on my PC, But i went into my BIOS and did a reset to default on all bios configurations. When i tried Warfame again, I thought it was fixed. 4hrs into my session, same issue again. recently, i've just been playing for 45mins to an hour then giving it like a 6hr rest and playing again for another 45mins. I think I've tried everything software related, Reinstalled the game, Reinstalled my OS, updated drivers, etc.

Is anyone else having this issue, or HAD this issue? Please let me know, PC specs below. 
(There was 1 other game that this happened with, but it only happened once, Space Engineers, but it was after a 6hr session) 

OS - Win10 64-bit
GPU - GTX 1070 8Gb 
Memory - 16Gb Ram
CPU - AMD FX(tm)-8350 Eight-Cor Processor 4.00GHz
MB - ROG STRIX B350-F Gaming Motherboard
PWS - 750w CoolerMaster
3 monitor setup. 

Warframe is currently installed on NEW 1TB SSD.