Only Fiji is an all-new chip
While we are getting close to the launch of AMD's new Radeon 300-series lineup, a new report suggest that most of the upcoming Radeon 300 series will be based on older GCN 1.1 and GCN 1.2 architecture while Fiji GPU will actuallly be the only new chip.
2048 GCN 1.2 Stream Processors
Coming September 2nd at US $249
Tonga rocks a 256-bit memory interface
Still no detailed specifications
In late August or early September
AMD targets NV GM107