Turkish tech site Donanim Haber got its hands on a leaked slide that reveals AMD's 2011-2012 plans for the laptop graphics market. Seems like the company is preparing to release three 28nm GPUs in Q4 2011, and a new 28nm top model is slated for Q2 2012.
The codename of this chip is Wimbledon, it has a 256-bit memory bus and is expected to have a power consumption of up to 65W. It uses the MXM 3.0 interface and will be available in configurations with 2GB or even 4GB GDDR5 memory. Performance is said to be 25 percent higher than the Radeon HD 6900M.