The Bulls climbed to the top of the United Rugby Championship table after handing Cardiff a third defeat from four in an 18-12 win.
Newly acquired Mpilo Gumede impressed on his debut as he helped the Bulls register a 43-30 victory over the Namibian Rugby side in Windhoek.
The Bulls have confirmed several new coaching appointments, including the addition of former Springbok assistant coach Gary Gold.
According to reports, Springbok No 8 Duane Vermeulen has declined an offer to serve as the defence and forwards coach for the Bulls.
A dominant performance from champions Stormers set up a United Rugby Championship (URC) semi-final with Connacht after a 33-21 victory over the Bulls in front of 46,888 in Cape Town.
Connacht's upset victory over Ulster in Friday night's first United Rugby Championship quarter-final is very good news for the Stormers and Bulls.