From this rando PDF, it looks like "Fan-out of 4". > *Fan-out of 4 is a process-... | Hacker News

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mikeyouse on Oct 5, 2018 | parent | context | favorite | on: The iPhone XS and XS Max Review: Unveiling the Sil...

From this rando PDF, it looks like "Fan-out of 4".

> Fan-out of 4 is a process-independent delay metric in CMOS tech.

The wrap-up slide at the very end has a bit of a rundown.

http://people.duke.edu/~bcl15/teachdir/ece590_fall14/Present...

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