Question System issues, mouse stutter on rx 5700xt

Nov 12, 2019
Hi everyone!
So i recently built a new Pc with the following specs

Motherboard: Asus ROG Strix B450-F Gaming

CPU: AMD Ryzen 7 3700x

Ram: 16GB Gskill

GPU: Gigabyte Radeon RX 5700 XT Gaming OC 8G

PSU: Thermaltake Berlin 630W

So the issue here is that for some reason (even though i have a 144hz monitor) everything seems to be running at 60hz and below, im having mouse stuttering and the System randomly not everytime but eventually shuts down and gives me a "VIDEO_SCHEDULER_INTERNAL_ERROR". I tried reinstalling every single Driver and reinstalling them. But nothing seems to help. Watching youtube/ twitch the videos seem to be lagging /taring and the Audio is kind of crackling too.

But when i launch a game like Apex Legends everythings seems to be running smooth im getting 160 FPS + but when im out of a game everything goes to sh**. The weird part is if i go to my Device Manager and disable the Display Adapter everything is running smooth but without a display adapter u can only browse the web i guess. So please if anyone knows how to solve this issue please let me know :)