It comes soldered to your choice of Micro-ATX or Mini-ITX motherboards in Minisforum's BD795 series. The ITX version of the motherboard still packs in lots of connectivity. There are two models ...

Designed to fit the Micro-ATX motherboard standard, you can even mount the Blitz in a contemporary PC case and run it on a standard ATX power supply. An earlier prototype of the Blitz motherboard.

You won't fit a standard-sized ATX motherboard inside this thing, or even a micro ATX motherboard like you can in the aforementioned CX600 (it supports micro ATX and mini ITX). Instead ...