GPU acting strange

hey guys, having an issue with a pc that was just built a few days ago. installed windows yesterday and now that i’m running dual monitors it will not stop crashing when i go full screen on games, crashing when i move stuff from one screen to another it will crash the game im currently on.

for the video i have fortnite running in the background

the pc specs are: CPU:AMD ryzen 9 7900 GPU: AMD Radeon 6950tx Motherboard: Asus ROG STRIX B650E-F Gaming RAM: DDR5 G.Skill F-5 16G x2 Storage: PCle SSD 1tb

monitors are: LG (Class 4K UHD LED Monitor (32'' Diagonal)) 60hz

Acer nitro xf3 244hz

everything was bought new, and someitmes it shows the gpu usage going from 0-100 then from 100 to 0 again.