Weird sound right before shutdown, probably from new PSU. Is it serious?

HenriM

Reputable
Oct 31, 2015
2
0
4,510
I bought and installed a new PSU (Seasonic 760w platinum) yesterday, since my previous one was getting really old. When i started to shut down the computer at the end of the day I noticed that my computer made a high pitched short whine noise right before shutdown(like just as the power went off from the computer). I'm pretty sure the sound is coming from the new PSU, since it is the only new part and It sounded like it came from it when i shut the PC down multiple times after it to make sure, so lets just say im 90% sure.

So: Could this be a flaw and something serious or just a little quirk with this particular model/unit?
Should I be concerned? Could it be because I have the hybrid fan mode on? BTW the computer works and boots up just fine like it always has, and the sound isn't there while the computer is running.