South Africa beat New Zealand by five wickets in the third one-day international on Saturday, sweeping the series 3-0 to take a firm psychological advantage into the three-test series starting Wednesday. Marchant de Lange took 4-46 as South Africa bowled out New Zealand for 206 in 47 overs, dismissing the home side inside 50 overs for the second-straight match. In reply, South Africa coasted to victory with 40 balls to spare, with opener Hashim Amla again being the top-scorer with 76. Captain A.B. de Villiers clinched the win with a six from the second ball of the 44th over. South Africa won both of the first two one-day internationals by six wickets and has now won five straight matches against New Zealand after winning the three-match Twenty20 series 2-1. New Zealand: R Nicol, M Guptill, B McCullum, K Williamson, J Franklin, A Ellis, K Mills, C de Grandhomme, M Bates, A McKay, N McCullum South Africa: J Botha, H Amla, M de Lange, AB de Villiers, JP Duminy, F du Plessis, J Morkel, R Peterson, D Steyn, W Parnell, L Tsotsobe