The specifications of AMD’s next generation of graphics cards seem to be there. The HD 7900 series (HD 7950, HD 7970 and HD 7990) will be certainly launched in Q1 2012 with 28nm transistors. The GPU, codenamed Tahiti (PRO and XT) will use a new architecture called GCN for Graphics Core Next (the current HD 6900 is based on a VLIW4 architecture). The other important change of the HD 7900 series, is the presence of the XDR2 memory in place of the GDDR5. The XDR2 memory is twice faster than GDDR5. The Radeon HD 7970 will have 2048 shader cores (1536 for the HD 6970), 128 texture units and 64 ROPs. And the power consumption will 190W, 60W in less than the HD 6970.
But before releasing the HD 7900, AMD will produce the GPUs for the HD 7800 series (HD 7870, HD 7850 and HD 7650) planned for the end of 2011. The Radeon HD 7870 will be powered by the Thames XT GPU (28nm, VLWI4 architecture, 1536 shader cores) and will be available with 2048MB of GDDR5 memory.