But the Blues conjured up a fine try early in the second quarter. Will Boyde used quick lineout ball to surge through midfield, and Jarrod Evans’ expertly-judged chip kick bounced up sweetly for Rey Lee-Lo to touch down.
Evans converted for a 7-3 scoreline, yet it was Ulster who went on to boss the closing stages of the first half. The hosts coughed up a series of penalties with Ulster opting for close-in scrums.
From one such five-metre set piece, Cooney attacked off the base and Cardiff replacement Olly Robinson failed to release after the tackle, earning 10 minutes in the sin-bin.
The Ulster forwards were unable to force their way over, but up stepped Lowry, tidying up a loose pass and showing great pace to beat two defenders and cross the whitewash despite Kristian Dacey’s despairing tackle.
Only a point separated the sides at the interval, though, as Cooney slid his conversion wide. Cardiff also missed a chance to retake the lead, five minutes into the second period, as Evans was off target from a straightforward penalty.
There were scoring chances inside both 22s, replacement Sean Reidy’s breakdown poach thwarting the Blues, and then Lowry could not hold onto a pass as Ulster searched for a second try.
There was a lengthy stoppage for a head injury to Cardiff try scorer Lee-Lo. He was injured when tackling Luke Marshall who made a welcome return off the Ulster bench.
Into the final quarter, Cooney arrowed over a penalty into the wind to move Ulster four points clear. His leadership and tactical play grew increasingly influential down the final stretch.
A word too for Louis Ludik’s injury replacement Ethan McIlroy, who impressed under the high ball. Ulster’s solid defence ensured that they maintained their 100% start to the new season.