TPU points out that the upcoming driver launch of AMD's Mantle API will target only four GPUs initially; the Radeon R9 290X, R9 290 (non-X), R7 260X, and A-Series "Kaveri" APU-integrated R7 200 series.
Owners of all other Radeon GPUs, including those based on the Graphics CoreNext (GCN) architecture, such as the recently launched R9 280X and R9 270X, are out of luck, for now. AMD is still ironing out issues with Mantle on those other GCN GPUs. Interestingly, in the same press note, DICE posted performance numbers yielded on an HD 7970, which look promising.
