PC restarts when I play heavy games

I don’t know what to do anymore. I’ve tried everything. The PC keeps restarting all the time, but it only happens when I play heavy games like Cyberpunk and GTA V. I’ve been monitoring the temperature and CPU and GPU usage. The GPU goes up to a maximum of 85. I believe that’s a normal temperature?

I’ve never changed the thermal paste on the graphics card or the processor. My setup is only 1 year old. I have a Palit 3060 that I bought on AliExpress. I never had any problems before. It only started happening now.

I use updated Windows 11, updated drivers, everything is up to date but the problem persists. What else can I do?