Right now I am running a Crosshair V Formula Z motherboard and 2x sapphire vapor x r9 290-x, diemensions of one card are 12.0" x 4.5". My current case is a NZXT Phantom 630 and I'm wondering as it is tight already with 2 cards if I work my way to having 4 gpu's should just get a different case or I need a new motherboard.