Is my PSU alright?

exploder2013

Honorable
Feb 10, 2013
56
0
10,630
Few days ago my PSU started making this strange repeating sounds.
Link: http://www.files.fm/down.php?i=ctpwcli&n=Record_0002.wav (turn your volume up to hear them).

So I'm quite worried if my PSU is alright. I still have my warranty left but I don't want my PSU to break other components. Should I be worried or not?

PC specs:
CPU: Intel I5 4670K
Motherboard: Asus Z87-K
GPU: Asus Radeon HD 7950 DirectCU II V2
PSU: Seasonic S12 II (620W)
RAM: Corsair Vengeance Black 8GB

Thanks.