The computer case can be purchased at the store, or you can make it yourself, as the master did. The material for the case was aluminum. The walls are made of ordinary and perforated aluminum sheet, and the frame is made of aluminum corner.
First done model cardboard cases.
Then the sheet is cut and bent.
A frame is assembled from the corner and a wall of perforated aluminum is attached to it.
Then the upper frame is cut out and fastened.
The front panel is made
and back.
It remains to install the side panels.
All is ready.