No PC is truly silent, but your computer shouldn’t be noisier than your lawnmower. If you have to turn up your music just to drown out the whirring or grinding noises your computer makes, you may want ...

Low and behold I hear this weird noise coming from inside my computer. Reminded me of Mothman Prophecies and all the weird noises. Its not coming from the speaker, I unplugged the fans, and the noise ...

The only real way to diagnose the problem is by trial and error. If you think it is the power supply, swap it and see if it still makes the noise.