Calculation :
Efficiency = Input/Output
If PSU is 80% efficiency rated then IT means it gives only 80% of the power taken from mains to the Hardware .. The rest is wasted as heat ...
Hence your machine needs more than the rated power to meet its requirement.
ie: 100/80 * PSU wattage ... And you multiply the it with time you use it(in hrs) ...
It gives you kWh`s .. Multiply the kWh with with the per unit rate of your electricity supplier ...
Hence Cost = 100/(PSU Efficiency) * PSU Wattage /1000 *Time (in hrs) * Cost per Unit
This gives you a rough idea about how much electricity your machine consumes ... Actual values are different for many reasons ...
1.PSU efficiency is calculated in a controlled enviroment in the lab
2.Voltage fluctuations around the country
3.Surrounding temp of the PSU
These factors contribute to the overall performance of PSU .....
Calculation :
Efficiency = Input/Output
If PSU is 80% efficiency rated then IT means it gives only 80% of the power taken from mains to the Hardware .. The rest is wasted as heat ...
Hence your machine needs more than the rated power to meet its requirement.
ie: 100/80 * PSU wattage ... And you multiply the it with time you use it(in hrs) ...
It gives you kWh`s .. Multiply the kWh with with the per unit rate of your electricity supplier ...
Hence Cost = 100/(PSU Efficiency) * PSU Wattage /1000 *Time (in hrs) * Cost per Unit
This gives you a rough idea about how much electricity your machine consumes ... Actual values are different for many reasons ...
1.PSU efficiency is calculated in a controlled enviroment in the lab
2.Voltage fluctuations around the country
3.Surrounding temp of the PSU
These factors contribute to the overall performance of PSU .....
at the end it show 123.xx that means it pull 123 units or KwH??????????/
Unit used for electricity = kWh. 5 units of electricity = 5 kWh.
Quote:
Electricity
The energy unit used for everyday electricity, particularly for utility bills, is the kilowatt-hour (kWh), and one kWh is equivalent to 3.6×106 J (3600 kJ or 3.6 MJ).