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Read about the design, verification, and making of the 165-million-transistor Xbox 360: a first-pass-good processor with advanced debug and test features, designed to the exacting standards of a gaming platform, with high throughput, low latency, low cost and low power - and very tight deadlines.
This chip is in fact a three-way symmetric multiprocessor design. The three PowerPC cores are identical, except that they are physically reflected through the X and Y axis. Each of the CPU cores is a specialized PowerPC chip with a VMX128 extension related to (and partially compatible with) the VMX instructions in the G4 and G5 CPUs. The three CPU cores share a 1MB Level2 cache.
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