I don't know but my psu is plugged in in my avr, when I turned on the avr switch the psu have a little coil whine, not loud enough but if I stick my ears on the grill of my psu I can still hear it, on or off in my system and my motherboard lan network will on in few seconds even if I still don't push the power button on my system that is weird sorry for my english my new build is cpu intel g4560, psu seasonic s12ii 520w rev.2, gpu palit gtx 1050ti dual oc, ram 1 stick 4gb ddr4 2400mhz 15cl hyperx fury, mobo asus h110m-d, hdd wd 1tb caviar blue but when if turned off my avr switch the coil whine goes off and the mobo lan led will shut off too