From the Wadax site:
“The operating system chosen for Atlantis Server is an extensively modified Windows 10. Custom software elements have been developed for Atlantis Server.
Atlantis Server is a sealed and fan-less design. A detailed thermal study was done to optimize and minimize thermal gradient within the product. A custom aluminum machined cooler was created for the purpose.
The choice of the hardware platform is very special. More than 50 different platform combinations (microprocessor, RAM, motherboard,..) were measured for key parameters and ONE combination delivered better results over the rest, which is the lucky number inside Atlantis Server.”
What you see is the motherboard inside the aluminum machined cooler to dissipate the Intel processor heat...