New South Wales ran in 11 tries en route to a 72-10 humiliation of the Southern Kings at Nelson Mandela Bay Stadium in Port Elizabeth.
Meanwhile, a couple of opportunist first-half tries set the Bulls up for a 48-14 victory over the Hurricanes at Loftus Versfeld in Pretoria.
The Waratahs took just 19 minutes to secure a four-try bonus point and led 46-10 at half-time.
10-72 Penalties conceded:Waratahs 8-7 KingsTime in opp. half (%):Waratahs 43-57 KingsRuns:Dave Dennis (NSW) 13Offloads:Israel Folau (NSW) 7
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The Kings, making their Super Rugby debut this season, entered the match hoping to maintain a good run against Australian teams.
They had beaten the Western Force in their debut match, and pipped the Melbourne Rebels and held the Brumbies to a draw on tour.
But the men in black never stood a chance of extending the run as a Waratahs outfit, upset at getting no points from an unlucky 11-point defeat by the Bulls at Loftus Versfeld last weekend, took it out on the rookies.
The outcome could have been even worse for the outclassed Kings, as three-try right wing Cam Crawford had another disallowed by the television match official and half-back Brendan McKibbin missed four of 10 shots at goal.
It was the biggest winning margin in Super Rugby this season, bettering the 64-7 hiding dished out by the Sharks to the Rebels in Durban in March.
Defeat for the Kings continued a dismal weekend for South African sides as the Stormers lost to the Blues and the Sharks were beaten by the previously winless Highlanders in New Zealand.
Crawford triggered the try avalanche before a small crowd and full-back Israel Folau also went over for a 12-0 lead before Kings fly half Demetri Catrakilis cut the deficit with a penalty.
But it was only a temporary reprieve for the South Africans, as Crawford struck again before lock Kane Douglas collected the bonus-point try with just a quarter of the game completed.
Flanker Michael Hooper, left wing Peter Betham and Crawford, for the third time, crossed the goal line and four McKibbin conversions had Waratahs 46-3 up before the Kings scored their lone try.
Flying teenage right wing Sergeal Petersen intercepted a pass from prop Benn Robinson and darted over for a spectacular touch down with Catrakilis converting to leave 36 points between the sides at the break.
The merciless Waratahs dropped a couple of gears in the second half, but still added four tries via skipper and back rower Dave Dennis, Betham and replacement backs Ben Volavola and Tom Kingston.
McKibbin kicked one conversion and substitute Matt Lucas two as the Waratahs won for the fifth time in 10 outings and climbed three places to eighth.
The Kings remained second last, a point above the Highlanders.
Waratahs: 72 (C Crawford 3, P Betham 2, I Folau, K Douglas, N Hooper, D Dennis, B Volavola, T Kingston tries; B McKibbin 5/9 cons, M Lucas 2/2 cons; B McKibbin 1/1 pen)
Kings: 10 (S Petersen try; D Catrakilis con, pen)
Clinical Bulls blow Hurricanes away
Outside centre JJ Engelbrecht rose to intercept a pass from prop Ben Franks midway through the first half and dotted down to score the first of six tries by the Bulls.
48-14 Penalties conceded:Hurricanes 13-7 BullsTime in opp. half (%):Hurricanes 51-49 BullsRuns:Victor Vito (HUR) 10Offloads:Tusi Pisi (HUR) 2
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Right wing Akona Ndungane pulled off a similar act of stealth as the opening half drew to a close, intercepting a Tusi Pisi pass and racing over for a try fly half Morne Steyn converted to give his team a 27-0 half-time lead.
After a torrid first half in which they struggled in the line-outs and scrums, the Hurricanes made a superb start to the second half with a 35-second try from half-back TJ Perenara that fly half Beauden Barrett converted.
But the Hurricanes’ dreams of a fifth victory in Pretoria lasted just five minutes in cool, clear late South African autumn conditions.
It was loosehead prop Dean Greyling who put the Bulls back in the ascendancy with a pushover try that the television match official took some time to clear and Steyn added the extra points.
A brilliant break by replacement back Tim Bateman set up Perenara for his second try on 54 minutes and another Barrett conversion made it 34-14 with 26 minutes remaining.
But there was to be no grandstand finish from the visitors, who ran the ball at every opportunity.
Although Greyling assured the Bulls of a bonus-point win, top place in the South African conference and third on the overall standings, the home side did not let up.
Replacement backs Lionel Mapoe and Louis Fouche crossed for converted tries to complete a surprisingly one-sided victory and leave Steyn second on the individual points table.
Bulls: 48 (JJ Engelbrecht, D Stegmann, A Ndungane, D Greyling, L Mapoe, L Fouche tries; M Steyn 5/5 cons, L Fouche 1/1 con; M Steyn 2/3 pens)
Hurricanes: 14 (TJ Perenara 2 tries; B Barrett 2/2 cons)