He got his powers from the Ship but he doesn't depend on it, Taa-2 possesses information that lead to omnipotence. This has been stated in two Korvac storylines, and that's why Korvac became so uber after hacking the ship.
depends where he's at. uber-form could likely take Galactus out, to an extent.
__________________ "We are turning into a nation of whimpering slaves to Fear—fear of war, fear of poverty, fear of random terrorism, fear of getting down-sized or fired because of the plunging economy, fear of getting evicted for bad debts or suddenly getting locked up in a military detention camp on vague charges of being a Terrorist sympathizer."
-Hunter S. Thompson
—"Extreme Behavior in Aspen," February 3, 2003