msi rtx 2080ti gaming x trio

Hello guys. I know almost nothing about hardware so one of my friends built a PC for himself and I just want to copy it for myself. But I wanted to ask you about your ideas and some questions about the parts. First of all I want to show you the system. Then I will explain the details and ask...

I recently installed the MSI RTX 2080Ti Gaming X Trio before this i had MSI RTX 2080Ti Aero. After installing the Gaming X Trio my all games are crashing to desktop after 20-30 minutes without any system error. It just showing the game crash error. I tried a clean windows installation. I tried...