Constant driver timeouts, freezes, stuttering black screens and so on

So yeah i really need some help i’m out of my knowledge … I am so exhausted of this. It is not really related to MSFS but i’m happy about any help I can get

The following problem exists:
I’ve had a new PC for about 5 months and since 4 months i experienced massive stutters freezes and black screen also some black and white screen flickering and of curse a lot of driver timeouts.

When i’m in a browser does not matter which one videos and streams and the overall ui lags sometimes even windows itself. So when i play a video and for example zoom in out of the flightradar24 map the hole video lags and can cause the browser or the driver to crash and of course drags the simulator into the abyss.

Even in the moment when i switch tabs in the browser i got lags in the sim. Here are some videos:

Since this my first AMD card i blamed the drivers.

What i’ve tried so far:

  • 5x Windows completely reinstalled, each 2x Win10 and 3x Win 11
  • 4 different AMD drivers tested Optional and Recommended
  • Updated the bios from version F4 to F5 and downgrade to F3
  • XMP profile of the memory deactivated and system tested alternately
    with only 2 modules
    System:
  • Checked the temperatures (HotSpot max. at 95°C) The card itself max. at 82°C, the rest of the system temperatures are also fine.
  • Different power supply and checked the wiring
  • Different monitor cable used

I also tried a GTX 1050 and here also the same problems appear.

Here is my system:

⦁ Gigabyte B660 GAMING X DDR4
⦁ i5-12600KF with an be quiet! Dark Rock 4
⦁ MSI RX 6800 XT 16GB GAMING Z Trio
⦁ CORSAIR Vengeance LPX 32GB (4 x 8 GB) 3600Mhz C16
⦁ 850W quiet! Straight Power 11 Gold
⦁ 2x 1TB Crucial MX500
⦁ 2 Monitors LG UltraGear 27GN880-B and LG 32UN880-B

Thanks for every help!
Daniel