i bet the vents on the bottom coordinate with the silent fan direction for convective cooling and may be less efficient if inverted. my 2013 mac pro (the alum

i bet the vents on the bottom coordinate with the silent fan direction for convective cooling and may be less efficient if inverted. my 2013 mac pro (the aluminum cylinder) and my powermac g4 cube both used that on purpose and i think my always silent mac studio does too. https://en.wikipedia.org/wiki/Power_Mac_G4_Cube https://en.wikipedia.org/wiki/Power_Mac_G4_Cube