A bead that is made with ferrite material in hollow cylinder-shaped to provide simple as well as economical technique to attenuate or suppress high-frequency ferrite core, noise withinelectronic circuitsis known as ferrite bead. Alternate names of this are ferrite block, ferrite ring, ferrite choke...
one that normally fluctuates. The coil is there to try to stabilize the current to provide a more regular stream of power. When the electrical current is increased to a certain point, the magnetic field around the coil can cause it to vibrate, producing a whiny sound. ...
JonnyGuru mentioned The PSU's meant to control the noise here at the primary output capacitor before sending to the motherboard and GPU and it's seemingly failing miserably - so a ferrite bead on the AC input could help if its noise from external sources making the PSU strug...
If you build your own electronics and want to reduce RFI, you can install a ferrite bead or core in the internal wires. This is a more complex procedure that involves knowing the hardware’s voltage output as well as the heat dissipation.[4] The manufacturer of the ferrite bead should ...