The All Blacks have completed the perfect Rugby Championship with a 57-15 demolition of South Africa, lifting them within sight of a Test world record.

The two-time defending world champions completed the most dominant campaign of any team in the history of the Sanzaar competition, securing a bonus point in each of their six wins.

All were lop-sided affairs, most notably today's romp in Durban in which the visitors scored nine unanswered tries, running the kick-happy Springboks off their feet.

Captain Kieran Read said he felt a world class performance was within his team after going close without quite nailing it this year.


"To come to South Africa and score a victory like that, it won't come again I don't think, so you've just got to be stoked," he said.

"This is a great bunch of men and I'm privileged to be leading them. I'm loving what we're doing right now."

Attacking statistics underlined New Zealand's mastery, beating 33 defenders to the Springboks' two. Their combined running metres of 758m eclipsed the home team's 174m.

Coach Steve Hansen says breaking the world record for successive wins won't enter his mind until he returns to New Zealand.

"We'll enjoy the moment. We've managed to play some quality rugby and make some people proud," he said.

"It's better than the last one but it's not perfect so we won't get too carried away."

The All Blacks showed no signs of any distraction from the midweek controversy surrounding Aaron Smith.

The halfback chose to return home after being suspended for a game after it emerged he was involved in a tryst with a woman in a disabled toilet at Christchurch Airport.

South Africa, who lost four of their Rugby Championship Tests, failed to produce the performance they wanted for captain Adriaan Strauss, who was playing his last Test on home soil before retirement.