Needing 171 to win, the Knights reached their target with eight balls to spare.
Christoffel Klijnhans (67* off 54 balls) and Jacques Snyman (90 off 52) set the tone at the top of the order with the latter hitting 10 fours and three sixes.
The result was a foregone conclusion by the time Snyman was dismissed off the first ball of the 18th over with the score on 156. Captain Pite van Biljon finished on 12*.
Earlier, the Warriors posted 170-5 in their 20 overs, with 21-year-old Tristan Stubbs top-scoring with 65 off 35 balls. He hit three fours and five sixes.
Gerald Coetzee and Jacques Snyman each picked up two wickets for the Knights.
