What graph? You can't compare Zen 2 perf/watt (which probably does peak around 65 W) on the same graph as Zen+ perf/watt. They are different architectures on different nodes. You can't just ignore facts that don't fit your narrative, especially when they were stated to you in the post you're replying to. I would certainly expect Intel's 10nm Ice Lake to have better performance per Watt up to a certain point compared to AMD's 12nm Zen+. Idle frequency is not the same as base frequency. All chips downclock below base frequency at idle to save power, and have done since 2002. Intel call it SpeedStep, AMD calls it Cool'n'Quiet. Base frequency is the minimum frequency the chip will run at while under sustained load.