I designed my own case and here is a detailed temperature test I did on the first prototype.
by aplusb
Finally got the first prototype from manufacture from China, and here is a detailed temperature test:
http://hardforum.com/showpost.php?p=1041886278&postcount=270
It was done on an overclocked i5 4690k and a R9 390 (Gigabyte).
If you are interested in the design process, here is the link: