No, as the above poster said, Intel slows down the CPU before any actual increase in power consumption or temperature occurs, because their fear that their power limit and temperature controller will not be able to react fast enough when the power increase eventually happens.

Whatever control mechanism is used in the AMD Zen CPUs is better than Intel's, so they downclock only when the power consumption really increases and the clock frequency recovers when the power consumption decreases, so there is no penalty when using sporadically some 512-bit instructions, like in the Intel CPUs.