The Main PC is the one to which the cables from the ceiling (IPS and lab cam) are connected. It is the third PC from the entrance door when you go straight, the one that is bigger than the others.

Specifications

Memory16 GB
ProcessorIntel Core i9-7900X CPU @ 3.3 GHz x 20
GraphicsGeForce GTX 1050 Ti/PCIe/SSE2