The Phantom 2 Vertical GPU mount is an important aesthetic addition and improves the layout particularly if you are water-cooling. The mounting components are built from brushed stainless steel and it comes included with a PCIE 4.0 Riser Cable. If you are using the Phantom 2 D5 Reservoir Distribution Plate, then the Phantom 2 Vertical GPU Mount is required due to the location of the integrated D5 pump.