Re:An easy solution (Score 1)

Spare CPU cycles are free.

You think they are? Well, they are not. As long as you are running a half-decent OS which halts the CPU when its idle it will conserve power. Significant power that is. Depending on your CPU, the difference will be something like a two-digit wattage, I guess. Multiply this with the number of CPUs and you'll end up with - well, I can't be bothered to do the math, but I wouldn't be surprised if we'd be talking about the equivalent of a really decent power-plant.