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Engine Model tok/s TTFT Chip · RAM Quant GPU W tok/s/W (GPU) SoC W J/tok J/tok active Idle W Last seen Samples
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Energy columns. SoC W: package power (GPU, CPU, Neural Engine, DRAM, memory controllers) from Apple's IOReport counters during the measured prompts. J/tok: that energy per generated token, prompt processing included — a lower bound on what a wall meter reads. J/tok active: minus the engine's loaded idle (Idle W). GPU W: the GPU rail alone, legacy. A dash means not measured — never a zero. Details: metrics spec M9–M12.