I’m thinking my power supply might be messed up.

There’s a few games that I get incredibly low FPS on to the point where it’s unplayable. I have a pretty good PC (Ryzen 5600 3600 tI 16 GB ram) so it should not be happening.

What made me suspect it is the power supply is I got a new monitor for Christmas that is 2K with 144 HZ. When I started using it I’ve noticed that my computer has started to lock up even when just turning it on. Sometimes the mouse and keyboard won’t even turn on. I’ve also had a bunch of issues with Bluetooth but idk if that is related.

Is this a PSU issue or possibly something else? I am really really hoping it’s not my GPU because if it is I am fucked. I’m planning on getting it checked out today I just want to have an idea of what is wrong first.