I have tried a lot now: my PC simply restarts with a black screen and says in the log that the Radeon driver has crashed. I have meanwhile expanded my power supply to 750W, both power connections connected directly from the PSU, all chips updated, WIN 10 64 replayed, all updates installed, uninstalled and played via ddu driver. Nothing helps. Why is there such a card if it is garbage? What should I do, send it back and switch to NVIDIA? DXDIAG Report in the appendix