That Video Board needs it's own case.
I bet in the next few years we will be seeing fully external video processing units to replace cards all together. They will figure out some kind of adapter that connects to your PCI EXpress slot, then mounts to an open PCI slot with connecter, then a high speed cable that will connect to the external video processing unit. (dubbed - XVPU)
4 GPU'S
GIG's of DDR3 memory
All kinds of pixel shaders & trillions of transistors...
Liquid metal cooling system...
It'll cost like 1,500 dollars or something...