Steyn comes back as Holder greets him by crashing the pacer's second ball over the covers for a six.
But Steyn gets hie revenge as Holder top edges the pull shot and is caught at mid-on after a good hand of 56 from 48 balls.
West Indies fold in the next over as Morkel gets the wicket of Benn, caught at first slip for one. The extra bounce accounted for the left-hander who could only fend it to first slip to end a disappointing effort by West Indies.
West Indies are bowled out for 151 to crash to a massive 257-run defeat, their second from four matches in the World Cup.
No. 9 Holder was the top scorer for West Indies with 56 and the only batsman to cross the 50-run mark.
This was after South Africa posted a massive 408 in their 50 overs courtesy of AB de Villiers, who played a sensational innings of 162 from 66 balls.