How do I prevent system restarts during Genshin Impact combat on MSI B450M MORTAR MAX?

Liyue Harbor combat caused sudden restarts. I tried a thicker 24-pin cable, but it caused loose contact issues. I used the GamePP Resource Scheduler to set Genshin Impact to Real-time priority. RTSS frame time stabilized from 4-15ms to 3-4ms. GamePP Hardware Sensor showed VRAM bandwidth at 85-92%. Core temps stayed at 62-68℃. No more random crashes.