This crash happens rarely in Rainbow 6 (High Settings) and always within the first 30 minutes of Subnautica (High Settings). The crash happens as follows: First the screen goes black and the audio still plays normally for a few seconds. Then the audio goes out and the computer requires a force shutdown.
AMD Ryzen 5 1600X Six-Core Processor
RX 480 8GB (Driver 18.1.1)
16GB DDR4 RAM
600w Bronze PCU
Windows 10 64bit