> Imagine if x86-64 ditched the variety of non-32/64-bit modes. Would x86 be able to better compete with ARM in power consumption? In what way? Do you mean ins

> Imagine if x86-64 ditched the variety of non-32/64-bit modes. Would x86 be able to better compete with ARM in power consumption? In what way? Do you mean instruction decoding? There is very little separation between x86 and ARM on that. x86 is optimized like crazy for the common instructions. https://en.wikipedia.org/wiki/CPU_cache#Micro-operation_(%CE%BCop_or_uop)_cache https://en.wikipedia.org/wiki/CPU_cache#Micro-operation_(%CE...