Just getting some sun in
But in all seriousness, turbo and 'normal' modes are way too loud edit: for now in a residential setting. The names are a bit misleading though and 'normal' is actually to run at a high ambient of 31C. Running 'normal' at normal room temp will get the same hash rates as turbo was designed to do. Working now at getting quiet mode even quieter (its the PSU which is very loud at the moment), but its promising. Also designing the real cooling mods which are looking promising at the moment - just want to get this PSU out of the way first.
I don't know what sort of cooling mods you are going to do without putting it in something larger than a 1U enclosure. You need to dissipate the heat somehow. Just curious what sort of engineering background you have?