Just before I knock off for the day, breaking news from VR-Zone cites that AMD's RV770 will arrive on June 18th (fitting it into the time-frame defined earlier today).
RV770PRO is Radeon HD 4850, RV770XT is Radeon HD 4870 and R700 is Radeon HD 4870 X2. AMD will be shipping RV770 GPUs to AIB by end of this month and you can expect different card designs from the manufacturers at launch. AMD is set to launch the Radeon HD 4850 on June 18th and it is definitely a hard one with retail availability on the same day. Radeon HD 4870, however, will be launched a week later on June 25th with retail availability in July due to GDDR5 availability. Radeon HD 4870 X2 will come later in Q3. As for the clocks, we won't be revealing them yet but the RV770XT core clock is not going anywhere above 800MHz. 
