weird little sound on psu sliverstone ZM1200M

[heatkiller]

hi all , i just got my new sliverstone psu ZM1200M and fixed in the system......

but very weird, everytime i switch on the power,
i can hear a little small continous "beeing/huming" frequency sound .
it is normal???

need follor users help thx.

[DarthBeavis]

no. I have at least four of these PSUs. that is not normal bud

[Computurd]

I have the very same psu, rock solid with NO noise.

[kamieldehond]

probably a coil resonating, if so nothing to worry about

[Mekrel]

My old Silverstone Olympia did this, they RMA's it - excellent service but the replacement did it too..