I think that's a typo - the Apple Silicon M1 has a "ROB is in the 630 instruction range" - https://www.anandtech.com/show/16226/apple-silicon-m1-a14-deep-dive/2

I think that's a typo - the Apple Silicon M1 has a "ROB is in the 630 instruction range" - https://www.anandtech.com/show/16226/apple-silicon-m1-a14-deep-dive/2 https://www.anandtech.com/show/16226/apple-silicon-m1-a14-de... "ROB" and "OOO" might have gotten mixed together here. OOO = Out-of-order. Refers to the fact that the M1 can decode instructions in parallel. ROB = Re-Order Buffer. Refers to the stage where the parallel instructions get put back "in-order" and "retired."