I'm curious too because looking at pictures of the VRM it looks like it has less output filtering. My guess is that the board firmware tells the CPU to be less

I'm curious too because looking at pictures of the VRM it looks like it has less output filtering. My guess is that the board firmware tells the CPU to be less aggressive until it can deliver the power because it has a less overbuilt VRM (still 90A power stages though...). That probably means more of the phases are always active which in this case is probably an advantage as it means there is no long ramp to turn on a phase. I'm going to guess the fact that the phases are doubled also means the board is less likely to turn off phases as it would lose two not one.