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While true, the same math holds for 22 nm^2 (484) to 14 nm^2 (196).

Real world gains will never be as high as the math suggests, as you get into leakage currents etc.

Sure, I never meant to imply that previous process steps were much smaller, just that this one is still formidable in its own right. Real world gains will not be 100% but they're a very large fraction of that. Obviously any technological advance in a mature industry is going to show reduced return on investment at some point, it's rather surprising that the ROI on these process shrinks is still worth it given that we are now well beyond what was thought to be possible not all that long ago.

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