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ATI Technologies has released new documentation of Xenos, the custom graphics processor designed by ATI for the Xbox 360, at its Developer Program web site.
The Xbox 360 graphics processor, codenamed Xenos, has a 500 Mhz clock speed and 48 shader pipelines featuring an unified shader architecture, a first for a commercial graphics processor. The Xbox 360 GPU actually consists of two cores, a parent die that has a total of 232 million transistors and a daughter die, which has over 100 million transistors and acts as a frame buffer among other functions. This daughter die is manufactured by NEC Electronics using 90nm technology in the company's 300-millimeter (mm) wafer fabrication facility.
The following, is a presentation by graphics hardware architect Michael Doggett of ATI Research that was part of the EG2005 conference program
