I'm trying to make the Apollo run at it's absolutely quietest setting, even below ECO. It would be awesome if you could answer a few questions I have about it.
I'll address noise in my upcoming review, but I managed to get it very quiet while running on full speed and 200W, by giving it 4 little feet and two PC fans above and below the device. They are pretty quiet and add more airflow, so the internal fan auto-lowers itself. By additionally placing the unit in a strategical way, it's inaudible from my workspace.
No issues with PSU noise since I run a 450W Seasonic PSU and its fan barely turns at 200W of load.