Australia beat Argentina 36-20 in Perth to hand the Rugby Championship title to rivals New Zealand.
The All Blacks had thrashed South Africa 41-13 earlier in the day and, despite the Aussies' five-try showing, the Kiwis have now regained the title from the Wallabies with two rounds of matches still to play.
Three tries in the first 15 minutes set the tone for the contest, with Samu Kerevi diving over with just 42 seconds on the clock.
Dane Heylett-Petty added another after eight minutes before Will Genia crossed the whitewash, with Bernard Foley landing all three conversions and another in the second period.
Genia scored again after the break before Michael Hooper rounded off the try scoring for the Wallabies.
Santiago Cordero and Facundo Isa scored for the Pumas but they were never in touch and sit at the bottom of the table with just four points to their name.