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== Architecture and Processor == The Performa 6420 uses a PowerPC 603e processor soldered to the Alchemy logic board and cooled by a fanless heatsink. The processor is a 32-bit design with a 64-bit data path to main memory. The 40 MHz system bus provides communication between the CPU and other components. Third-party processor upgrades are available that can override the soldered CPU via the L2 cache slot.
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