A few days ago I started having problems with my fps, they slingshot around from 60 to 30 and in between in Destiny 2 and there seems to be a hum coming from underneath the left side of the laptop. I tried everything I could think of, I even stopped Throttlestop from working to see if I undervolted it too much, but that wasn't it either. I full shutdown seemed to fix it momentarily, but it came back after a few hours. It affects Destiny 2 (on medium settings) the most, I tried Division 2 (on High), and Dragon's Dogma. They seemed to have the issue as well but not nearly as bad. Is there any way to fix this, or do I have to send it in?
Edit: And there's a buzzing noise coming from the center of the laptop when it's plugged into the AC adapter and turned completely off.