Sure but why limit ourselves to "which is watts of heating per watt of energy input." Wouldn't "amount of useful work per watts of energy input" be OK? So if I

Sure but why limit ourselves to "which is watts of heating per watt of energy input." Wouldn't "amount of useful work per watts of energy input" be OK? So if I am putting in 100 watts constantly to my PC I am getting 100 watts of heating & 1 unit of computing. Which is more than 100%