South Africa completed a resounding innings and 18-run triumph - and three-nil series whitewash over Pakistan - on day three of the third and final Test at Supersport Park in Centurion.

A full 239 runs in the red overnight, the tourists promised much at the start of Sunday, but characteristically under-delivered, ultimately affording host captain Graeme Smith a record 50th career victory.

All out for 235 in their second innings, considerably better than their first-innings effort of 156, Pakistan were left to lament a slew of inadequacy that allowed them less than 10 days of cricket from a possible 15.

The veteran Younis Khan fell early, before opener Imran Farhat and the talented Azhar Ali resisted for 22 promising overs. The turn of the lunch break, though, brought a resumption in the status quo: dominance from the hosts.

92 for two fell to 114 for six in under a dozen overs, as right-armer Rory Kleinveldt ended an otherwise quiet showing with a key brace. Fast bowler Dale Steyn, secured the two wickets required to surpass former fast bowler and current bowling coach Allan Donald's tally of 330 Test wickets.

Pakistan resistance, again, resumed in the form of wicketkeeper-batsman Sarfraz Ahmed and aspiring all-rounder Saeed Ajmal's 69-run stand for the seventh wicket. The former gathered the highest score of his burgeoning career an the latter justified his position at eight in the orderm but neither were genuinely going to turn the contest.

Their departures were a quick succession, and resistance from the remaining tail-enders was futile. They, at least, prevented debutant Kyle Abbott from securing a record 10-for. The rookie right-armer, instead, settled on fixture figures of nine for 68 - and the Man of the Match award.

Sunday's triumph, capped by spinner Robin Peterson's removal of tail-ender Rahat Ali, heralded the arrival of the Proteas' fifth straight win of their home season.

Next season, however, will bring a testing return visit to Pakistan - and home series against India and Australia. The planet's number one Test nation have proven themselves formidably until then, though.