I do not want to overclock the GPU, i want to under clock it. Now, with that said, would underclocking it save power? if so how do i under clock it what would be good settings to use. I will just be using my mbp for email, internet, chat, and music which isnt too video intensive... i dont want a mb too small. and i would want a iMac if i got that and i dont want to spend that much money so would it be ok and save power to underclock it and if so how much should i under clock it? thanks!!!