Can check bios, but not sure if that's where you'd look. Alternatively check if your cpu fan is 100% ok. A chip or something can throw it off balance and make it much louder than it should be. You can also look into buying a new fan for it that is known to be quiet; I don't think they're too expensive.
Also to be safe you can download a popular temp checker and make sure your cpu isn't getting hot. And you should probably specify if it's your cpu or gpu gan.