PSU static clicking sound

eazy1

Prominent
Jul 25, 2017
3
0
510
My PSU makes this annoying zapping sound:
https://youtu.be/znqL56n1pQU
The sound is present (although quieter) even when the PC is turned off..
PSU is Seasonic Prime SSR-850PD, before I had a Corsair RM750i which had the same sound!! So i replaced it but surprise, same thing now ... Could it be a component which causes this? I have also tried a different wall outlet, same thing ..
Thank you

EDIT: sorry i posted in Graphics Cards section, can someone move this?