Looking at the clockspeeds and memory bandwidth available,I would hazard a guess that the IGP will probably be between HD7750 GDDR3 and HD7750 GDDR5 level performance,probably closer to HD7750 GDDR5 level as many modern games are more shader heavy. Remember that even with GDDR5,832 shaders at 600MHZ are probably slower than 640 shaders at 1GHZ,which the HD7770 GDDR5 has.
However,in compute performance the IGP is going to be a monster when compared to the HD8670D.
With the improved CPU cores,I suspect Kaveri is going to be a good general purpose CPU.
I suspect at 600Mhz they are the mobile variant, I could be wrong but I think that's whats listed here.
The Desktop variant should be clocked at ~1Ghz.
Keeping in mind that a 7770 has 640 SP's @ 1Ghz, one of these with 832 SP's I can see being as fast as a GDDR5 7770, its almost as many SP's as the 7790 @ 896 SP's.
Some may think "meh... 7770 performance" but for integrated Graphics that is some serious horse power, its a significant leap forward.
Just on a side note, just a week ago I would have said there is no way in hell they have squeezed a 7790 onto the same DIE as the CPU.
But with the rumours floating around about AMD's new Hawaii GPU having grown 30 / 40% in technical specification while only actually growing 15%~ in physical size makes me think again, somehow (and there are real ways to do it if there is room for it) it seems AMD have managed to process shrink without actually shrinking the DIE, and quite significantly so.
Not with standing the truth behind those rumours, they sure do look reliable.
Anyway, this is duplicate thread, can a mod merge these please? thanks