Not sure about that one. They never mentioned nvidia voltage requirements when i looked at it a week ago. But I guess its something new that they discovered.
if I were you, I'd email them first to see about their return policy.
And to get the optical drive out, all you do is pull the switch with a small lock icon down to the unlock position, and then push the slider near the middle of the backside outwards, right?
my optical doesn't want to come out that way :[
edit. haha apparantly the latch wasn't pushed all the way so it didn't eject. stupid me.