Haha yeah. I remember back in the day when a PSU with 16-20A on the +12V rail was enough to power something like a 7800 GTX. When I first read that it has that amount of amps, I had to double check it with another website to make sure
But yeah, the 480 would be a good choice if I was after PhysX or a slightly less expensive card. However, when I build new PCs, unless I've got the best available, I'm not satisfied and kind of feel I've wasted some cash on a product that isn't going to perform as well as what is already available.
As soon as I have it built, I'll be benchmarking it to see it's capabilities