Am I not right in thinking that a graphics card will use much less power when not in use? I mean, for pure downloading at night, there would be minimal graphic rendering, so the GPU should power down is it not?
Also, if you have a second HDD, just use the Powersave option to "turn off HDD after ..... minutes". Second HDD will turn off once say 10 minutes of non usage are up.
I'm definitely not removing any RAM from my PC, the only thing which actually makes a difference.
What's the point of downloading HD content when you can't play it due to 255MB of RAM and no graphics processor?