A question about power usage
I'm starting to look at building myself a computer for gaming, and I'm probably going to go for a 500W power supply. Maybe a little more, maybe a little less. The thing is, I tend to leave my computer on for things like Bit torrent, or maybe because I forgot to turn it off, or I'm lazy, whatever, and that's a lot of power to be using when I'm not doing much. Obviously, I could just turn it off, but are there ways to run it using less power when I'm not using much proccessing power or my graphics card? Or does it do this automatically?
I know that I might not even use all of my power supply, depending on what I have installed, but power isn't free and if I could save some money on my electric bill in the future, maybe I could afford more on computer parts now.