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My PC randomly reboots while gaming. Sometimes it happens in menu without launch a game, sometimes 5 min after start, sometimes 3-6 hours or none - no pattern there. It happens in 3 of 4 games i playing currently: Euro Truck Simulator 2 (4-5 hours)American Truck Simulator (0-5 min)Natural Selection 2 (1-3 hours) PC Rig: CPU AMD Ryzen 3 3100GPU NVIDIA GeForce GTX 1050 Ti 4GB Low Profile MSIPSU Corsair SF450 450W (changed from Chieftec CSN-650C 650W - not helped)MotherBoard MSI B550M PRO-VDH WiFi (came back from guarantee - not found any issue with that part, it’s 100% ok)RAM GoodRam IRDM X DDR 4 1x16GB 3200MHz CL16 (changed from HyperX - not helped)SSD AData SwordFish 1TB4 fans 80x80 Max temps (during games): MotherBoard: 48CCPU: 59CGPU(hot spot): 78CSSD: 40C There is a log from last reboot: The system was rebooted without a clean shutdown first. Possible causes of the error: The system has stopped responding or has crashed, or there has been an unexpected loss of power. Nazwa dziennika:System Źródło: Microsoft-Windows-Kernel-Power Data: 31.05.2021 15:22:00 Identyfikator zdarzenia:41 Kategoria zadania:(63) Poziom: Krytyczne Słowa kluczowe:(70368744177664),(2) Użytkownik: SYSTEM Komputer: DESKTOP-3SAEVNN Opis: System został uruchomiony ponownie bez uprzedniego czystego zamknięcia. Możliwe przyczyny błędu: system przestał odpowiadać lub uległ awarii albo nastąpiła nieoczekiwana utrata zasilania. XML: <Event xmlns=“http://schemas.microsoft.com/win/2004/08...> 41 8 1 63 0 0x8000400000000002 24024 System DESKTOP-3SAEVNN 0 0x0 0x0 0x0 0x0 0 0 0 0 false 0 0 false 0 0 false I have no idea how to fix it now. Please help

Your GPU looks to be the problem try warranty replacing it.

It could be bad wall outlet, Power Supply Unit (PSU), Motherboard, or RAM. Check for hardware driver updates. The best bet will be the wall outlet or PSU. If you have another PSU try it and if the problem no longer occurs then it is the PSU.