Kip Noble led the way with a hat-trick as the Welsh side reopened a three-point lead at the top of the table - although Steelers do have two games in hand.
Steve Moria (two), Ivan Matulik (two), Vezio Sacratini, Jason Stone, Ken Hodge and Doug McCarthy were also on the mark as Cardiff stylishly made up for their stumble in south Yorkshire with the biggest home win in the league this season. The outcome was never in doubt as Cardiff led 6-0 by the time Jason Jennings got Panthers off the mark.
The sharp start was in stark contrast to Devils' slack opening in Sheffield, when they succumbed to a devastating first period from Sheffield, who established a 4-0 lead in the first five minutes and stretched it to 6- 1 at the first buzzer.
Cardiff shook off their slackness to win the next two periods 2-1 and 3-0, but Alex Dampier's team held on for a crucial 7-6 win.
Nottingham Panthers beat Newcastle Cobras 4-3 on Saturday, with a rare double from the defender Graham Waghorn proving decisive.