well they are compatible but you need to upgrade to at least a 500w psu like a corsair cx500
As for the actual size of the case, I am not sure, you have to do some measurements on your own across the pci express slot, you need about 11" space for that gpu
another gpu (better/shorter and cheaper) would be http://www.newegg.ca/Product/Product.aspx?Item=N82E16814202003