Title says it all. Also, could anyone recommend me a compatible motherboard?
as far as case goes, look for a mid tower case or better, one made for the gamer are sure to have room for high end cards. like this http://www.newegg.com/Product/Product.aspx?Item=N82E16811129021
the mother board only requires a pcie 1.0 or pcie 2.0 slot, but is dependant on the cpu you plan to use, or are using. and the features you want. are you planning a new build? if you want to list what you use your computer. i, and others would be happy to make recommendations.
I am incredibly happy with my case i just bought; it's a Cooler Master Centurion 590 and it has the ability to fit 8 fans (without mods) and i can also fit my friend's radeon 4850 (i believe) in it. It is also slightly cheaper than the above stated case. You cant go wrong with Cooler Master.