Powered by what?
Solar panels in a place where the sun doesn't even rise for months at a time? That big beefy transmission grid that the Antarctic continent is so famous for? The jillions of oil wells already drilled into the Antarctic?
Oh wait, I know: penguin guano.
Pass the crack pipe, you've had enough my friend.
Antarctica was chosen because the area on the mainland between 90 degrees west and 150 degrees west is the only major piece of land on Earth not claimed by any country[1], which makes it a good place place to locate businesses that do not wish to be subject to regulations on Artificial Intelligences. Plus it's much more inconvenient to attack than it would be if you located it in a volcanic island.
[1] Sez wiki.