Captain Laura Wolvaardt once again showed her class, smashing a superb century to underline another dominant Proteas performance under the lights in Johannesburg.
Ireland's 205, posted in 46 overs after choosing to bat, never looked enough on a surface offering little assistance. Nonkululeko Mlaba's excellent figures of 4-33 led the South African attack, while Tumi Sekhukhune chipped in with 2-27.
A superb diving catch from Wolvaardt at extra cover removed Amy Hunter early to set the tone, and although Gaby Lewis’ half-century (64 off 80) offered resistance, Ireland struggled to lift their scoring rate. When the final five wickets tumbled for just 13 late on, their total looked well short of a competitive mark.
In reply, Wolvaardt and Tazmin Brits raced to a 50-run stand inside seven overs before Brits departed for 26, edging behind off Arlene Kelly. But Wolvaardt continued to command proceedings, moving to her 39th ODI half-century.
Karabo Meso was elevated in the order, but the teenager was dismissed for 17 via a stumping off Aimee Maguire. Sune Luus (25 off 23) kept the scoreboard ticking before she was caught behind the stumps, and Dane van Niekerk added 10 before Kelly struck again.
The minor wobble was quickly settled as Faye Tunnicliffe joined Wolvaardt to see out the chase without any major alarms.
The single that carried the South African captain to three figures also confirmed the victory and 3-0 sweep, as Wolvaardt and the Proteas Women closed out the year in fine style.
Laura Wolvaardt and Sune Luus struck centuries as the Proteas Women posted their highest ever ODI total before beating Ireland by 74 runs in Gqeberha to take an unassailable 2-0 lead in the series.
Miane Smit struck a maiden fifty while Sune Luus also struck an unbeaten half-century as the Proteas Women cruised to a seven-wicket win in the opening ODI against Ireland at Buffalo Park in East London.
Captain Laura Wolvaardt struck a record-breaking century to help the Proteas Women thrash Ireland by 105 runs in the first of three T20Is played at Newlands on Friday.
Dane van Nierkerk is set to return to international cricket after an absence of more than four years after being included in the Proteas Women's squads for the white-ball series at home against Ireland.
