AMD: "We have true 4k GPU. It gives 55fps average in crysis Yey!!! BUT!! only in reduced 4:2:2 color subsampling (HDMI 2.0 bandwith can do 4:4:4) the latter written with small letters
So it is not real 4k gpu and with 4 gb vram HBM it could not be. Benchmarks is one story real games at 4k will...