I have not tried the Noctua because it's a little bit underpowered for the PSU. My rigs are running at load for [email protected]
, so I can't afford to let the PSU overheat.
I'm not saying it doesn't work well, it probably does, but I need mine for 24/7 use and I prefer to be a bit safer.
So I also expect the Noctua would be quieter at load because lower max rpm, I don't know about idle unfortunately.