Slower clock speed = more battery/less heat?

[That 1 Guy]

Does a slower processor clock speed mean more battery and/or less heat? (2.7 vs 3.4 GHz)
Will a difference of .7GHz make a noticeable difference in heat and battery?

 

[basroil]

For a given processor, yes, slower means less energy. Cut clock in half and the energy consumption usually becomes a quarter. That does not mean a specific task will use less energy, since slowing the system down means that task takes longer!

When comparing two different processors, there's no way to tell without thorough testing in laboratory environments. Too many variables involved.