This is an eight core, 32 GB, 4 TB Intel XEON machine I built for work.
I use it for modeling, video work, writing, image manipulation and Game building.
The case is 18 inches wide, 21 inches deep and and 26 inches high
The desk is hand built. Nothing special, just an 8 foot piece of 3/4 inch BTX (That’s plywood with one good side) cut to accommodate a 30 inch wide desk-top for five and a half feet which leaves a small area on my right for the printer, power center, etc. I built in a sliding keyboard mechanism, and even so I keep the keyboard on the desktop. Habit.