MSI Vortex puts two GTX 980s in one cylindrical case
 

MSI has released the Vortex, a gaming tower that packs quite the punch. In fact, tower may not be the right word to describe this beast, as its cylindrical form measures just 10.5" tall and contains just 6.5L of interior space. Despite those constraints, MSI has managed to squeeze in hardware as powerful as two GeForce GTX 980s and an unlocked Intel Core i7-6700K processor.

http://techreport.com/news/29867/msi...lindrical-case