I need a case that allows 4x crossfire or basically a setup that will allow the 4 cards to sit next to eachother ... once that gets fixed then i can figure out risers...
PCIE 1x to 16x is fine... but i need at least 4 slots that i can evenly space out 4 cards...
i need a new mobo...
Any 8 slot case will support four 2 slot gpus, if the motherboard spacing for the gpus allows it.
The problem is heat, though. If you don't want your gpus running at 100C or more, that will only work if you watercool, or buy an expensive rack mount case designed to hold a bunch of graphics cards, like the chenbro rm41300g.
Most people running four or more gpus on a single motherboard use an open air enclosure, which could be as simple as a 10$ plastic crate with a wooden dowel through it to hold up the cards.
