Friday, 10 March 2017 : Joe Schmidt’s men sit second in the table, three points behind unbeaten England, having beaten Italy and France after an opening defeat in Edinburgh.
Fourth-placed Wales are out of title contention after back-to-back defeats by England and Scotland.
Both sides have named unchanged starting XVs for the game in Cardiff.
Ireland can set up a title decider with England in Dublin on 18 March with victory in Cardiff.
Ireland coach Schmidt is known to value continuity and the tournament’s leading try scorers – they have 13, four more than the second most prolific team, England – have used just 19 players in their starting line-up so far.
The previous time he was able to field the same side in the Six Nations was the third round in 2014.
The only change in the match-day 23 is winger Tommy Bowe’s recall for his injured Ulster team-mate Andrew Trimble.
Schmidt has stuck with exciting young centre Garry Ringrose, as there were doubts over the fitness of the more experienced Jared Payne.
Number eight Jamie Heaslip will make his 100th Test appearance on Friday as he wins his 95th Ireland cap in addition his five appearances for the British and Irish Lions.
Source : Internet