Since the very first DirectX 10-ready graphics cards by AMD, we've been used to the "Radeon HD xyz0" nomenclature, in which "x" denoted generation, "y" market segment, and "z" variant. That all is about to change with the company's Volcanic Islands GPU family, which will be unveiled (at least to the press), later this month. Using the same "x, y, z" variables as mentioned before, the new nomenclature could look like "Radeon Ry xz i" (where the new variable "i" could denote special features).
More here: http://www.techpowerup.com/190428/next-generation-amd-radeon-series-nomenclature-detailed.html
R8950 will replace my HD 7850, am I naming it correct?