^^, you can't compare a console gpu with a pc gpu,
example, DOOM 3 for PC needs atleast a geforce 6800gt to run properly
and DOOM 3 was alsow made for the xbox,
now some nvidia history
the nvidia riva tnt 2 was before the geforce, it was released in 1999, lets call this the first generation then the geforce 6 would be the seventh generation and it was released in 2004
back in the old days from the first pentium 3 the riva tnt2 could play games like half-life 1 & doom 1 and quake 1, maybe quake 2 aswell, i don't know
and since the xbox had a modded tiva tnt 2 model 64, well you get my point,
how the hell that they made that a first gen gpu in a console could perfom as a 7 generation gpu in a pc is because of the architecture.
So even if the ps4 would have a modded amd 4870 or a gtx260, it would surpass the current and next gen of gpu in pc world, mark my words
even now, the ps3 has a geforce 7800gtx, and it can play crysis 2 and battlefield 3" i pick these games because they are alsow on the pc and do need some decent pc to play these games, and i know that a pc with a geforce 7800gtx can't even play crysis 2 or bf3 even capped on 30fps instead of 60fps, just food for thought
i know the first time i saw killzone 2, and i was saying to myself NOWAY, how the **** did do this with such a old gpu card,