How much power does your PC use? Well there is an app for that :-)

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

Joulemeter is a software based mechanism to measure the energy usage of virtual machines (VMs), servers, desktops, laptops, and even individual software’s running on a computer.

Joulemeter estimates the energy usage of a VM, computer, or software by measuring the hardware resources (CPU, disk, memory, screen etc) being used and converting the resource usage to actual power usage based on automatically learned realistic power models.

Joulemeter can be used for gaining visibility into energy use and for making several power management and provisioning decisions in data centers, client computing, and software design.

Joulemeter Download Page at Microsoft Research

My desktop runs at an average of 118W. What does your system run at? Share with everyone in the comments and we can see who has the lowest number.