I’m usually not one to link to patents, but Apple’s applications for the Mac Pro include some beautiful imagery and this abstract:
Apple’s Patent Abstract: An internal component and external interface arrangement for a cylindrical compact computing system is described that includes at least a structural heat sink having triangular shape disposed within a cylindrical volume defined by a cylindrical housing. A computing engine having a generally triangular shape is described having internal components that include a graphics processing unit (GPU) board, a central processing unit (CPU) board, an input/output (I/O) interface board, an interconnect board, and a power supply unit (PSU).
<img src="http://static1.squarespace.com/static/52d73d05e4b008d128aa3ad6/52f53b1ce4b054f67738c1bb/548a00c3e4b0c0f815c2eb95/1418330308351//img.jpg" alt=""/>
I mean, just look at that thing. Mama.
via Apple Spotlight