Computer crashing when graphics card is at 100% with high temps while gaming

[vengefulrafael]

Hello!
I've been having an issue where if I'm playing a game that maxes out my GPU (for example The Witcher 3 or Kingdom Come Deliverance) it will get very hot, up to 93 Celsius under 100% usage and then crash. Specs are:

OS: Windows 10 64bit
GPU: Sapphire RX 480 Nitro+ 8Gb
CPU: Ryzen 1600
RAM: 16GB
PSU: Corsair CS650M
Storage: 120GB SSD

I checked the event viewer which just says "The previous system shutdown at 3:27:55 PM on ‎2/‎15/‎2018 was unexpected." and doesn't give any more info. Any help would be greatly appreciated!

 

[jr9]

- Try playing with the side panel of the case open. Blow any dust out of the case (and GPU) with compressed air. Do temps improve or does the it crash at all?

- How does it crash? Blue screen? Complete reset? Complete shutdown? Black screen and does nothing?