3 ms·
Modern CPUs have 64-bit word and virtual address sizes, so by normal definitions they are 64-bit. The physical address range is not the metric here. Besides, i
by throwaway7767 11y ago
Modern CPUs have 64-bit word and virtual address sizes, so by normal definitions they are 64-bit. The physical address range is not the metric here.
Besides, it would make no sense to have a 64-bit physical address bus. There aren't enough atoms in the universe to make memory to fill it.
- kuschku 11y agoIndeed it makes no sense to have a 64-bit physical bus, but the parent was asking why we don’t have 128-bit yet on consumer devices.