akash shrestha Posted January 14, 2012 Share Posted January 14, 2012 (edited) Why does a CPU's, PSU fan specially most of the desktops, makes a loud humming noise at the start up and then it becomes normal after some minutes? Edited January 14, 2012 by akash shrestha Link to comment Share on other sites More sharing options...
insane_alien Posted January 14, 2012 Share Posted January 14, 2012 changes in the fans speed means there are changes in torque being supplied by the motor. This can create noise which is caused by additional vibrations. Once the computer has reached a thermal equilibrium (the amount of heat being removed has steadied) then the fan has no need to speed up and the forces will be almost constant which will limit the vibrations and hence noise. Link to comment Share on other sites More sharing options...
akash shrestha Posted January 21, 2012 Author Share Posted January 21, 2012 Thank You. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now