When Gaming, Monitors goes Black screen and GPU Fans goes to 100%

Hey,

I saw that some people had problems with that too, but I never found a solution for that. I have this problem now for I think 1-2 Months, I did reconnect the power cable to the gpu and it was fixed for some days. But idk if that's the problem I have.

Here my Build: Pure Power 1000W 80+ gold, Gigabyte B660 Gaming X DDR4, Intel i5 12600kf, Gigabyte RTX 4070ti Gaming OC, Samsung 990 Pro 2TB m2 SSD, G.Skill RipJaws 32GB DDR Ram - with XMP 3600MT/s, Windows 11 Pro 24H2

Monitors: 1x Ultrawide 3440x1440 165hz 1x 1920x1080 120hz

PC has good temps, runs good and performance good at games

I used DDU to reset drivers, reinstalled Windows, updated to the newest Bios etc

Thanks for the help