Yes, I suppose so. But I'm just speculating here. I can't really imagine how much of a power drain the gtx480 is. I got this idea because at first I was thinking about doing a gtx480 - gt240 graphics - physics combo. I use my computer for simulations using physics, as well as the occasional gaming (but I like playing highly realistic games, so that 'occasional' doesn't really matter
) I wondered if when idling just the gt240 could be used, for power saving reasons, and that brought me here.