Part 1 of the first entry in "The Pleb Standard" (a work in progress). SLIM19 Guide, noticed a lot of folks getting pretty bad efficiency, check the PSU part of the guide towards the end of this entry. May help.

I am getting around 31 TH/s at around 21J/TH

https://www.montanibitcoin.com/theplebstandard/blog-post-slim19-part1