Details about AMD's next-gen high-end graphics card have hit the web. Rumored to be called Radeon R9 290X, the 28nm Hawaii chip will be AMD's answer to NVIDIA's GK110 GPU.
Based on a second-generation GCN architecture, this DX 11.2-compatible chip reportedly has a die area of 430mm² (18% bigger than Tahiti) with 2816 stream processors spread across 44 clusters with 64 SPs each.
The chip features four independent raster engines, compared to two independent ones on "Tahiti." This could translate into double the geometry processing muscle as "Tahiti," with four independent tessellation units. The memory interface of the chip is expected to be 384-bit wide, based on the GDDR5 specification. Given the way TMUs are arranged on chips based on this architecture, one can deduce 176 TMUs on the chip. The ROP count could be 32 or 48. The chip will feature hardware support for DirectX 11.2, including the much hyped shared resources (mega-texture) feature.