In any case, with a very small, square mini ITX mainboard that stands on its head... 6.7" x 6.7" (mini ITX). The slots+connectors are on top and it has openings on the side to run the cables to. Type: Assemble once and never touch again.... :-) Maybe the video here will help: https://de.thermaltake.com/the-tower-100-snow-mini-chassis.html