People close to ATI told us that ATI next-generation flagship product RV770 still uses the basic architecture of R600, but the specific structure is not the same as R600/RV670.

In addition, although both using RV770 chip, the memory controller in Radeon HD 4870 graphics card has more power consumption than the memory controller in Radeon HD 4850, because the GDDR5 configuration.

Rumors suggested that RV770 has 480 SP or 800 SP, but we heard RV770 may adopt a unified rendering + separate physical speeding up rendering mode, among the 800 SP, 480 SP are responsible for unified rendering, 320 SP are responsible for the physical acceleration.

Removing physical acceleration, we can see RV770 has 480 SP, if taking the physical acceleration into account, then RV770 has 800 SP built-in.