From what I've seen the CPU/ALU/decode at the center being ARM or x86 may make less difference than you think. The amount of circuitry and silicon area (correla

From what I've seen the CPU/ALU/decode at the center being ARM or x86 may make less difference than you think. The amount of circuitry and silicon area (correlated with power) for non core is significant. MMUs, vector instructions, complex cache hierarchy, high speed IO (DDR, pcie, you name it) extremely complex network on chip (infinity fabric) to enable cpu interconnectivity, etc. Is very significant. Look at the IO die size vs the CCD size. As one poster pointed out using chiplets have great advantages, but there is a power hit. Thankfully newer tech is bringing that power down too. I'd love to see a power breakdown of a full chip to see what % is attributed to the cpu core itself.