PS4 early specs 'more powerful' than Xbox 720, claims source

[Potable_Toe]

Is it worth noting that as far as the next Xbox is concerned that both the original Xbox and Xbox 360 used customised versions of GPUs released the same year as them? If the trend should follow then it would likely incorperate a, customised, HD7000 or HD8000 (2012/2013 respectively) series card.