I have it, and I can't hear it (I have 10 fans in my case tho)
It's an amazing PSU, the best I've had so far IMO (and I had Seasonic M12 600W, PCP&C Silencer 750W, Silverstone Decathlon 850W, all good PSU's)
Having flat cables alone is an amazing feature, they are long enough for any EATX case.
Great buy