I built a new PC:
AMD Ryzen 7 7800X3D
Gigabyte X670E AORUS MASTER (rev. 1.0) EATX AM5
Corsair Vengeance 64 GB (2 x 32 GB) DDR5-6000 CL30
Asus TUF GAMING OC Radeon RX 7900 XTX 24 GB
Preflashed the newest BIOS before turning it on. At first everything worked, installed Win 11 and some programs...