So far it hasn't happened in Doom and Assassins Creed 4. (Games i've been playing lately).
I reformatted my computer about a month ago, since then I've played Doom, AC4, and Kingdom Come Deliverance. Kingdom come is borderline unplayable because it happens roughly every 20-30 minutes.
I ran HWMonitor and my graphics card peaks at about 80C. Audibly it doesn't sound my fans are ever roaring before this happens. This might be key. At random intervals (when i'm off my computer in my apartment) my graphics card fans will start screaming for 10 seconds and then die down.
Event Viewer records the event as Source Kernel-Power Event ID 41, Task Category 63.
Windows 10 PRO
Intel Core i5 6500
ASUS H170 PRO Gaming Motherboard
16GB EVGA ram
Sapphire Radeon RX 480 8GB
Corsair TX750M Power Supply