3D printed chimney case

"I designed this case with the sole purpose of testing out a hypothesis I had from many years ago - Could a PC be passively cooled using the chimney/stack effect? This monstrosity of a case was born from this question, and it did not disappoint. Inside this plastic DIY case, is a large passive heatsink and an STX form factor motherboard with no case fans or moving parts."

Source: YouTube via MiniMachines