Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

How much electricity is required to power twenty average computers on a LAN?

share|improve this question

closed as not a real question by Lucas Kauffman, jscott, voretaq7 Jul 23 '12 at 20:57

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

How much wood would a wood chuck chuck if a wood chuck could chuck wood? – Mark Henderson Nov 22 '10 at 21:55
There is no way to figure this without knowing what the computers are..... If you give us the computer I guess its possible to tell you. – Jacob Nov 22 '10 at 21:58
Define what you consider to be "average" then we can talk. Are your figures supposed to include the LAN itself? – RobM Nov 22 '10 at 22:03

Well, an average office computer burns between 120-250 watts of energy at any given time, the LCD 80-150 watts. Multiply by 20 and you get 4Kw to 8Kw. Given the average 120v 20a circuit and you'll really need 3 circuits to cover all of that plus incidentals. 240v allows more overhead, you could probably get away with 2 circuits.

share|improve this answer
80W for an LCD seems... excessive. The Samsung 22" I use at work has a "typical" power draw of 40W - do you have a power meter you can test with? – Andrew Nov 22 '10 at 22:49
@Andrew Hey, it's a WAG. – sysadmin1138 Nov 22 '10 at 22:50

Typical office computers use anywhere between 50 and 150 watts depending on specification when doing normal office type work. Don't forget to include the displays too.

share|improve this answer

Many Asset management products will report on the hardware in use. You can use a KilloWatt device that measures power consumption, to assess how much each different model eats in terms of power.

Then you can build profiles for each hardware configuration, and report on them, to then multiply by your calculated power usage.

share|improve this answer
Agree with actually measuring the power draw during use instead of guessing or relying on manufacturers claims. – Andrew Nov 22 '10 at 22:56

Not the answer you're looking for? Browse other questions tagged or ask your own question.