Looks like it's mission impossible for what I need. I need a lot of bays, but I don't need CPU or PS power. Actually, power supply has to be really small, because CPU going to be G3220... If I look at desktops - I can get something with 10 bays (internal) of a decent quality. But rack-mounted So, it's about power-efficient storage with lot's of drives.. Maybe get some old 3U case with bunch of caddys and then install desktop-grade single PSU in it (I can do basic fabrication)... Replace fans with decent ones with adjustable speed and go that route?