I've a very slow internet connection at home. If I want to download some 1 GB of data from internet, I usually keep my laptop on for whole night. I use Flashget as my downloader. 

I want to do something by which most of the hardware which is not used, while only download is happening, do not consume power. Like for screen I have defined in power plan to go off after 1 min. But I want to conserve more power. 

Please help

Thanks in advance