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Details of ATI's Xbox 360 GPU unveiledPublished by patto on Saturday, October 15, 2005
' The guys over at techreport.com released some architectural details of the ATI GPU that will be used in the Xbox360 '
Feldstein, the Vice President of Engineering at ATI, cited several major areas of innovation where the Xbox 360 GPU breaks new ground. The first of those is the chip's unified shader array, which does away with separate vertex and pixel shaders in favor of 48 parallel shaders capable of operating on data for both pixels and vertices. The GPU can dynamically allocate shader resources as necessary in order to best address a computational constraint, whether that constraint is vertex- or pixel-related.
On chip, the shaders are organized in three SIMD engines with 16 processors per unit, for a total of 48 shaders. Each of these shaders is comprised of four ALUs that can execute a single operation per cycle, so that each shader unit can execute four floating-point ops per cycle.
News-Source: http://www.techreport.com
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