What is "coil whine" and what is that goopy stuff all over the inside of my PSU

[Jon Gerow]

What are relays used for in power supplies? all mine are old and have none.

In rush current bypass and to switch +5VSB to +5V in some models.

[ashiekh]

In rush current bypass and to switch +5VSB to +5V in some models.

The first I had forgotten, the second is new (to me).

[Stefan Payne]

Though 5VSB Bypass is done more often with MOSFETs instead of electro mechanical switches.

[ashiekh]

Though 5VSB Bypass is done more often with MOSFETs instead of electro mechanical switches.

No concern about the voltage drop?

[Jon Gerow]

No concern about the voltage drop?

Yes, if cheaply implemented. Which is why it tends to be a more expensive option.

[Jon Gerow]

Corsair HX620 coil whine and unstability issues Power Supplies. ... I rma that mouse, and razer said everything was fine, and i should check if my motherboard was ... when fps go to 800-900, results in a unbearable noise, and shortly ... revealed it and made me test the psu for things i never really had to, ...

Why are you responding to old posts with non-nonsensical gibberish?