Unused PSU Voltage

[lawrence281]

Just wondering, if you have for example a 1000W power supply, but your system components only require about 500, what happens? Does the remaining just stay there and not suck out extra electricity?

In what cases would you even eed a 1000W power supply? dual screen displays for SLI cards?

thanks

 

[lawrence281]

Thanks for the explanation, is there a specific brand for its quality of efficiency and quietness? I have a 520w Antec gaming psu, but i want to get a modular!