Like the Bonaire chip in the Radeon HD 7790, the Bonaire XTX in the R7 260X is a fully enabled GPU with 896 stream processors, 56 texture units, and 16 ROPs. The processor communicates with the frame buffer via a 128-bit bus
The Radeon R9 270X uses a graphics processor called Curacao XT. After reviewing the technical characteristics of the GPU, it is easy to see that this solution is based on the well-known Pitcairn XT chip, which is used for the Radeon HD 7870.
The Radeon R9 290 model is not much different from the top-end R9 290X, as it is based on the same Hawaii GPU of the Graphics Core Next architecture. In this GPU, the number of execution units has been increased while keeping the power consumption of solutions within acceptable limits.
The Radeon R9 270 model occupies a position in the lower part of the middle of the new line and is very close to the Radeon HD 7870 model known from the previous line. The novelty has some differences from last year's board, they consist in a slightly lower GPU clock frequency...
The AMD Radeon R9 280X is actually an improved version of the AMD Radeon HD 7970 GHz Edition, which now boasts support for the new AMD Mantle technology, as well as a more affordable price of $300.
The new Hawaii graphics chip at the heart of the AMD Radeon R9 290X graphics card is based on the already known Graphics Core Next (GCN) architecture, which has been slightly modified for computing capabilities and to fully support all the features of DirectX 11.2.
