Power Supply started making random loud sounds

pasteyh

Honorable
Sep 30, 2012
7
0
10,510
Hello!

I was had been playing WoW for over 13 hours yesterday when my Power Supply all of a sudden started making a loud propeller like sound. I instantly shut down the computer and then restarted it. After the restart it still made the sound but a bit lower this time so i shut of the computer for the night, thinking it might have something with overheating to do. So i started it again this morning and it was working fine until like 20 mins in it started making the same loud noise again. I restarted it again and it was gone. The build is about one month old and it's an Corsair CS 750M, 750W PSU and im pretty sure it's not a Coil Whine. Anyone have any idea what it might be?

Grateful for all answers, cheers!
 
Solution
Hi
A propeller like sound suggests the power supply fan blades are catching something.
Try looking at the fan and with the power supply off try rotating the fan manually.