It´s the same on every APU and it´s no a big deal as that it´s still much faster than traditional organization in discrete CPU+GPU usage.
That´s one reason Cerny has been talking about GPCPU use in future games and the extra 2 CUs PS4 has not recomended for rendering targets.
However there is a chance that the situation is not the same in the XOne archtecture since ESRAM is involved.







