How to find out how much electricity a PC consumes?

Question

Software and Internet Services

Are there software solutions that track electricity consumption?
Depending on the workload of the PC, its characteristics, iron, a different amount of energy is consumed. Are there software solutions?
Interested in Windows and Linux

Answer 1

Read http://habrahabr.ru/post/127322/ and http://habrahabr.ru/post/152449/

Answer 2

Buy a UPS, connect it to a computer, install drivers, see the real consumption of a computer in the program from this UPS

Answer 3

To calculate the PSU power - you need to calculate the power consumption by component - so much video card, so much processor / memory, so much hard drive, so many dvd drives, so much sound card, usb flash drives, phone charger, so much mouse / keyboard.
sum up, give 20-30 percent of the reserve and take the appropriate power supply.
Well, accordingly, the power has already been calculated, without printers, speakers and a monitor, of course.
to a smart uninterruptible power supply, you can still put real measuring instruments between the socket and the PC and measure it, because bios, oops, everything else tends to lie at different levels of error

Answer 4

PowerTOP from Intel.