[SOLVED] My new psu is making a slight noice when my pc is off

[dimitris79gr]

Ok so here is my story. 3 weeks ago i got a new PSU (the cx550m) installed it and it failed after about a week of usage. After it failed i noticed that it was making a very slight noice when i put my ear right next to it and when it was off. So i RMA'd it. Corsair sent me a new one 4 days ago and it has been working fine. But the new one i got is also making that noice (its very subtle i have to put my ear next to it to hear it) Is this something i should be worried about?

 

[Starcruiser]

What you're hearing is called capacitor whine. It's not an indication of any problem, but if it gets too loud send it back. Even when the system is off, a small amount of power is flowing through the power supply and the motherboard.
The new unit making the same noise is probably coincidence. I am quite sensitive to high pitch sounds and I can tell you just about everything in the electronics universe from fridges to computers can make that noise and it has no effect on operation.

 

[dimitris79gr]

What you're hearing is called capacitor whine. It's not an indication of any problem, but if it gets too loud send it back. Even when the system is off, a small amount of power is flowing through the power supply and the motherboard.
The new unit making the same noise is probably coincidence. I am quite sensitive to high pitch sounds and I can tell you just about everything in the electronics universe from fridges to computers can make that noise and it has no effect on operation.

yep i know that some power is still being used (for the ethernet port, usb devices etc) but the old old one i had didnt make any sound thats why i was a little big confused anyways im marking that as the best answer already