I think that is separate... look at this image:
http://imagescdn.tweaktown.com/news...-amds-radeon-r9-fury-x2-dual-gpu-hbm_full.jpg
It looks like the fan is separated from the main body which appears to look much like the regular fury. There is a clip that goes along the bottom and partly up... Dunno really hard to tell with the low quality of the pictures.
Super confused on how that sucker is mounted too, since its facing the glass, they using risers off the mobo with the whole thing upside down? Such a small case with lack of fans the thermals must be be amazing if that isn't watercooled.