3 month old psu making light vibrating/buzzing sound

Toggle sidebar Toggle sidebar
Confused Idiot

Confused Idiot

Reputable
Jan 9, 2015
179
0
4,710
My psu recently started making a faint buzzing noise, even when my pc is off it continues, and it gets louder when under load. Is this coil whine? IS this bad?
 
Solution
InvalidError
If there is noise while the PC is off, it would have to come from the 5VSB supply, which may (or may not) be normal.

Under low load, the 5VSB supply may operate in burst mode and what you are hearing is simply the 5VSB supply starting and stopping. As long as the output remains within specs, everything is fine.

Alternately, it could also be the 5VSB supply being unstable, hitting the high or low limit, shutting off, restarting, hitting a limit again, stopping, rinse and repeat, which would be bad.

To determine which one might be the case here, you would at the very least need a digital multimeter with min/max memory function and better than 1ms detection window. Ideally, you would use an oscilloscope to see exactly how clean (or...
Sort by date Sort by votes
gilbadon

gilbadon

Distinguished
Jun 16, 2008
1,856
1
20,460
When it is off... most definitely a coil wine. Nothing mechanical is running when the system is off, so that is the most common problem. I do not see why it would continue to whine while not under load though. That is a very sensitive whine. Does it still whine when you toggle the I/O switch (or remove the AC cord) in the back to close off the current.
 
Upvote 0 Downvote
InvalidError

InvalidError

Titan
Moderator
May 18, 2007
23,815
5,265
108,890
If there is noise while the PC is off, it would have to come from the 5VSB supply, which may (or may not) be normal.

Under low load, the 5VSB supply may operate in burst mode and what you are hearing is simply the 5VSB supply starting and stopping. As long as the output remains within specs, everything is fine.

Alternately, it could also be the 5VSB supply being unstable, hitting the high or low limit, shutting off, restarting, hitting a limit again, stopping, rinse and repeat, which would be bad.

To determine which one might be the case here, you would at the very least need a digital multimeter with min/max memory function and better than 1ms detection window. Ideally, you would use an oscilloscope to see exactly how clean (or dirty) the output actually looks.
 
Upvote 0 Downvote
Solution
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom