Scroll down until you come to the fury X specifications.
http://www.geeks3d.com/20150618/amd-radeon-r9-fury-x-detailed-specs-slides-hbm-no-hdmi-2-0-support/
That gpu-z shot is showing twice the Pixel fillrate of the official Amd slide.
he says under the gpu-z its reading wrong and hes sure Wizzard will soon fix it