I was about to buy a Microserver Gen 10, which idles at 43 watts while holding 4 7200rpm HDDs, whisper silent. https://louwrentius.com/hp-proliant-microserver-gen10-as-router-or-nas.html
Then a friend showed me this website, and the NAS killer 4.0 / 4.1. I put the gen10 on hold, and am now wondering: do any of the sample builds get close to the efficiency and silence of the Microserver gen10? They’re certainly more powerful, which is great, but noise and efficiency come first for me.