Tip: If your 3000-series nVidia GPU's fan has started to develop a rattling/ticking noise and you either can't afford a replacement fan or can't wait, try going into nvidia-settings, taking manual control of the fan speed, and ramping it up in 5% increments until you find a speed where it goes away and stays away. Then, leave it for a few hours before turning auto-speed back on. (I left it overnight.)

That shook the fan on my RTX 3060 back into idling quietly at 30% speed.