Jaque Fourie and Deon Fourie scored two tries each as the Stormers maintained their 100% start to the Super 15 season with a clinical 51-16 victory over the Western Force in Cape Town.
Jean de Villiers and Andries Bekker also crossed for the hosts, while the impressive Peter Grant kicked 21 points to continue his impressive form and push for South Africa selection.
The visitors' only try came courtesy of some individual brilliance by James O'Connor, who scored all the points for the Australians, but they were poor in the second half and failed to get on the scoreboard.
Defending champions Bulls bounced back from consecutive defeats to put their campaign back on track with a hard-fought 30-23 victory over the Lions in Pretoria.
Dewaldt Potgieter, Gary Botha and Bjorn Basson all scored tries, while Morne Steyn kicked 15 points.
Deon van Rensburg and Franco van der Merwe responded for the visitors, but they were left to rue several errors in key areas and eventually fell to a fifth loss in six games.
The Waratahs snatched a last-ditch 29-22 victory over the Brumbies, while Queensland Reds made it back-to-back wins at Suncorp Stadium with a 41-8 success against the Cheetahs.
Luke McAlister's goal-kicking carried the Blues to a 16-13 win over the Chiefs at Waikato Stadium.