RNZ reports a sloppy first quarter by the home side saw the Proteas take a surprise 16-14 lead and forced Silver Ferns coach Janine Southby make two changes to her starting lineup.
New Zealand turned in a much improved second quarter to finally take the lead and go to the halftime break 32-27 in front.
South Africa tried to cling to the Silver Ferns who stepped up the pace in the third quarter to extend their lead to 46-38.
The fourth quarter was dominated by New Zealand who went on to run away with the match by 19 goals, 65-46.