Where does it say the 7770 is going to be weaker than the 6870, and where does it say the price?![]()
It goes without saying they're going to be weaker. Less stream processors, narrower memory bandwidth. About the only thing they've got going for them is their 1GHz core clock. If you do a bit of googling it all becomes clear

They'll probably be getting near stock 6850 performance with prices around about £100-£110