Windows 10: Windows crashes directly after startup

Hello Everybody,today my new Gaming Pc came with following specs:CPU: Ryzen 9 5800xGPU: ASUS ROG STRIX rtx3080 10CMainboard: Asus Prime B550m-aRAM: HYPERX FURY HX432C16FB3/8 2x8 GBPower: 850 be quietSSD: E12S-1TB-PHISON-SSD-BICS4I spend my whole day trying to install Windows. While trying my machine shut down multiple times always a different bluescreen error and tried to reinstall windows. Somehow i finally managed to install windows with 100x bluescreens. Now directly after starting it restarts after 1-5 min.I tried different SSDs, different GPUs and RAM.When I am quick enough i can have a

:)

 

Can't get GPU-Z to start with Windows 8.1 startup

I'm not sure how to do that. Could you list the steps for a noob?

 

all games crash!

I suggest you run rthdribl > http://www.daionet.gr.jp/~masa/archives/rthdribl_1_2.zip
Increase the window size step by step and watch your vga temps permanently.
What happens?
If it crashes, run at stock speeds as suggested before and retry.

P.S.: When your system locks, does the display signal turn off after a time?
Stuttering sound or no sound at all when freezing?
What X1800XT model do you own exactly?

 

all games crash!

ive watch my temps and both the cpu and gpu are within normal ranges. when it freezes it simply freezes the image and stops the sound. i must reboot to get back to windows.