A JP Pietersen try and Handre Pollard's boot gave South Africa a 16- nil half-time lead before Nicolas Sanchez finally got the Pumas on the scoreboard.
The only disappointment for the Boks was that Bryan Habana was unable to claim the all-time World Cup try scoring record on his own.
The 32-year-old winger came within inches of scoring in the first half, only to be denied by the fingertips of Argentina full-back Lucas Gonzalez as they both chased a kick.
Source - BBC