[SOLVED] Brand new PSU making small buzzing noise when pc is off

[TheSpiffyOne]

Hello, I just got my brand new Corsair PSU (RM850x) everything seems good with it except one little thing. When I shutdown my PC the PSU makes a buzzing noise, it is subtle, but if you get close to it you can hear it, is this a cause for concern?

 

[Quanticriver]

probably the psu still provides some power, i'd go into bios and disable s5 state

 

[TheSpiffyOne]

probably the psu still provides some power, i'd go into bios and disable s5 state

What changes will I notice upon disabling the s5 state?

 

[Quanticriver]

this changes the "standby" function of your PSU, it's probably still giving power on it's 5v rail

 

[TheSpiffyOne]

this changes the "standby" function of your PSU, it's probably still giving power on it's 5v rail

I tried to turn it off in bios, but cant see where it is. Could you help me? Im on a Asus motherboard.

 

[TheSpiffyOne]

I fixed it, the buzzing was because of the breathing motherboard leds, turned on ErP mode (s4 +s5) and now the lights are off on shutdown and no buzzing!