If I don’t crank my GPU fan to its max settings while playing Rust, my GPU (AMD R9 270) will overheat and cause the system to shut down / blue screen. It’s not dust, dirt, etc. I have good cooling; water cooled CPU and multiple case fans including one large fan that blows directly on the video card. And I don’t have any dust bunnies trapping heat either. My PC is clean.
Rust is the only game that runs my GPU this hot; roughly 20ºC higher than any other game. And I’m not the only who’s reported this issue. Over the last few months, there have been a lot of people saying this. Unfortunately, people dismiss it as bad hardware, poor cooling, “because AMD”, etc and the threads die rapidly.
That said, the OP here is seriously overstating his issues. My guess is he’s experiencing the same issue that many others are but potentially doesn’t have enough cooling to prevent the cards from overheating.