OK, I'll explain this as you clearly have no idea what you are talking about. When one commissions a server or server farm it is done against a service non functional requirement. For example 1 second page serve time at peak load. This means that a lot of the time the servers might be waiting but not a peak load. Never the less, modern servers will clock down if waiting. Now, what sets the peak load is the efficiency of the software and the number of people using the server and/or the run length of the batch jobs. The more efficient the software the less servers are required to meet the peak load and so the less power is used all the time. Further, the more efficient the software the less often servers will have to clock up during off peak times. Do you finally get it? If not - I suspect you have zero idea about large scale computing and are here only to defend your lack of ability to program anything other than scripts.