The big change for consumer systems has come in displays.
Computer energy consumption software.
Calculate your pc s energy use.
Annual energy consumption ranges from 52kwh to 482kwh per year for computers and from 22kwh to 754kwh per year for monitors.
Using the energy star product finder you can select from hundreds of certified efficient computers from the best most trusted and most popular brands like apple dell hp lenovo and others in addition you can filter the list of models by specific attributes such as.
The electricity usage of a computer also heavily depends on the video card a high end video card can use a lot of power and having more than one sli or crossfire mode.
But as you ve probably gathered from the other replies the extent of which can be measured may be limited by hardware software or requ.
Different energy requirements of individual computers.
Microsoft s free joulemeter utility gives you a rough estimate of a windows system s power consumption.
But minor reduction in operational energy consumption in spite of the es energy efficiency increases.
Energy star makes it easy to find an energy saving computer to meet your needs.
Just because your pc is a beast with a 750 watt power supply doesn t mean it s going to use 750 watts all the time.
The annual energy consumption of the average office computer and monitor is influenced by two factors.
Not only do lcds use way less energy.
You can t take a random new computer and assume it uses less electricity than one from 2005 or even 2000.
Most pcs come with power saving features that lower your energy usage when the.
Such an energy model can be used during the test time to estimate the energy consumption of software and to check whether the software satisfies certain energy constraints.
Different usage patterns and user behaviour.
Use sleep mode and power management features on your computer to save money on your energy bill.
To answer the op more literally yes there is software that can monitor the power consumption of a computer.
Similar to timing constraints energy constraints can be captured systematically via assertions or via computing the worst case energy consumption wcec of the respective.
Tips for reducing your electronics energy bill.