PC Crash

I have a Problem and I need your help. My PC crashes. I had to replace my Motherboard and CPU due to another problem 2 weeks ago. Now i seem to have a Software problem. My PC crashes randomly. All 3 scrrens just go black. My Mouse and Keyboards RGB turn off as well. My PC is still running though. I had that since i replaced my MoBo. It would only happen every 20h the PC is running or so. So like every 3. day. I tried fixing it but didnt worry too much. Now I tried to update a Audio Driver. My PC didn't immideatly crash but it did after 5 min or so. If I start up my PC now it pretty much instantly crashs. Every 10 time it would boot and I could use it for 2min.

Thank you for your help