Do you want (1) a higher rate of stable and correct computations to be performed at a slightly higher energy cost, or (2) a demonstrably less reliable device at

Do you want (1) a higher rate of stable and correct computations to be performed at a slightly higher energy cost, or (2) a demonstrably less reliable device at a slightly lower energy efficiency? I'll go for #1 in most cases, as long as the system is to be relied upon for anything deemed important.