RGC 1404 gained ample revenge for their league defeat against the Newport in Colwyn Bay as they claimed victory in the cup.
Scrum-half Efan Jones gave the visitors a flying start as he took an inside pass from No.8 Tim Grey to score at the posts with only three minutes on the clock.
Billy McBryde added the conversion and then kicked a 40-metre penalty.
Two tries in as many minutes from left wing Harri Evans then gave the Gogs an even more commanding lead midway through the half. Both scores were created by fullback Dion Jones.
McBryde converted the latter and was then off target again when Tom Hughes crashed over for his side's fourth try.
Newport finally got on the scoreboard with a try at the posts by Geraint O'Driscoll, but it took less than a minute after the restart for RGC to work Iolo Evans over in the right corner and then McBryde added a penalty.
Newport grabbed consolation tries from Matthew Reed and Dan Preece.
Star man
Dion Jones – RGC 1404
