Anandtech's article indicates they have an out-of-order buffer of around 630 entries (Zen 3 is only 256 entries). The M1 has 7 integer math ports and 4 FP/SIMD

Anandtech's article indicates they have an out-of-order buffer of around 630 entries (Zen 3 is only 256 entries). The M1 has 7 integer math ports and 4 FP/SIMD math ports plus several bunch of load/store/branch ports . It seems like they could completely saturate those decoders given the right code.