Quote Originally Posted by LightSpeed View Post
Cayman will be the 6810/6830/6850/6870 (yes, four based on Cayman) to be released in November. The 6870 will be around 10 - 15 % faster than the GTX480, have clocks of 900/1500 and have 2GB memory.

Barts will be very similar to Cypress but on a new PCB and different clocks, maybe some SP's disabled and have 1GB memory.
Only 15% faster than the GTX 480 but with four different SKUs that are faster than Cypress? It would mean there would be tiny 5-10% differences between each of them, not likely.