Controller is an old Dell 755 running Debian 7. Hub is GekkoScience, and it and all six pods were powered off the same DPS1200. Everything stock, no additional fans, volt setting 7.
Cool thanks. I'm doing mostly the same except using Windows, and the default voltage. I might try using linux on a non-Rpi machine to see if it changes anything (already tried Raspbian but couldn't hash as fast as my Win10 PC) .