Xenos (graphics chip)

The Xenos is a custom graphics processing unit (GPU) designed by ATI (now taken over by AMD), used in the Xbox 360 video game console developed and produced for Microsoft. Developed under the codename "C1", it is based on the R400 architecture family, also known as "Crayola", which was also used in the AMD Imageon Z430 (later rebranded as the Qualcomm Adreno 200) and Z460 graphics chips. The Xenos introduced new design ideas that were later adopted in the TeraScale microarchitecture, such as the unified shader architecture. The package contains two separate dies, the GPU and an eDRAM (manufactured by NEC), featuring a total of 337 million transistors.

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