Joulemeter from Microsoft research

[Bwired]

Joulemeter is a software tool that estimates the power consumption of your computer.
It tracks computer resources, such as CPU utilization and screen brightness, and estimates power usage.

Could be a very handy tool to see what your 24/7 is doing
I cant test it, Only for windows 7 users

http://research.microsoft.com/en-us/dow ... 55565f794/