Yeah... Maybe we'd need to bump up the clock to exahertz to make up for the loss of precision and constant memory access. The top super computer is already at 148 petaflops, so we'd need some more headroom for general AI.

Of course, petaherz (10^15 cycles per second) is already the speed at which an electron circles around a hydrogen atom, so we may not be able to use electricity any more...