The Rugby Championship

All Blacks post record-breaking win over South Africa

New Zealand posted their biggest win over South Africa to complete a perfect Rugby Championship, winning 57-15 in Durban on Saturday.

The All Blacks have swept aside everyone in their path in this year's competition and finish with a maximum 30 points from their six matches - the first time a team has scooped every point on offer in the history of the Rugby Championship or Tri Nations.

Israel Dagg, TJ Perenara and Beauden Barrett all touched down twice, with the awesome All Blacks - leading 12-9 at half-time after falling 6-0 behind - racing clear courtesy of seven second-half tries.

South Africa offered little in response and were once again reliant on the kicking of Morne Steyn for points.

The All Blacks had long since wrapped up the Championship, while the Springboks could now lose second place to Australia, who face Argentina in London later on Saturday.

Steyn, having kicked the Springboks to a hard-fought victory over the Wallabies last weekend, split the posts with fifth and 18th-minute penalties.

Israel Dagg crossed for the game's first try after 22 minutes, collecting Jerome Kaino's offload to go over down the right, but Steyn's consistency saw South Africa into a 9-5 lead.

Beauden Barrett, by contrast, was struggling with the boot, missing his first two kicks of the match, but he was on hand to add the extras when TJ Perenara charged over - a try awarded following lengthy consultation with the TMO to determine whether the scrum-half lost control of the ball.

Steyn missed with an attempted drop goal and Kieran Read had a try disallowed for New Zealand before half-time, but the All Blacks put daylight between the teams after the break.

Dagg crossed for his second four minutes into the second period and, while Steyn continued to outperform Barrett from the tee, the All Blacks number 10 pounced on a blocked clearance to clinch the bonus point.

Perenara finished off a neat passing move to add a fifth try for the visitors as the Springboks crumbled, and Barrett became the third man to double his tally when he broke from halfway to go over.

And the misery was not over for the Springboks, as Codie Taylor bundled over and Ben Smith benefited from the quick thinking of Barrett to further stretch the advantage for Steve Hansen's men.

Liam Squire then completed the rout, with Lima Sopoaga adding further gloss to a 17th win in a row with the conversion, equalling the record for consecutive victories by a tier-one nation.

The All Blacks will look to claim the outright record when they host Australia in the third and final Bledisloe Cup fixture at Eden Park on October 22.