Comment by wongarsu

Hetzner is all about doing things efficiently, in unconventional ways.

There are some Youtube videos of people getting tours of their data centers. It's a very custom setup, keeping both component costs and energy costs down. Their earliest servers were basically tower PCs on shelves, their more recent generations are more akin to custom rack designs with inhouse-assembled servers, with a datacenter design that exploits natural convection to do a lot of the cooling.