automatic shutdown of the game

Hello, I'm having a Crossfire issue. The game crashes automatically during gameplay. The game crashes to the desktop without any errors. I've tried uninstalling the game and doing clean installs, I've tried removing and reinstalling drivers, I've even disabled everything running in the background, including antivirus and all drivers not needed for the game, and the game still crashes. So the problem must be with the game. I've also tried running the game in different Windows compatibility modes and older versions of DirectX, as administrator, and no matter what I do, the game crashes after 15-30 minutes of gameplay.