Warren Gatland's return was spoiled by Ireland as the world's number one side humbled Wales 34-10 in the opening Six Nations match in Cardiff.
Ireland's storming start saw tries from Caelan Doris, James Ryan and James Lowe - and 12 points from Johnny Sexton - establish a 27-3 half-time lead.
Wales improved in the second half and responded with a Liam Williams try.
But it was Ireland who completed the scoring with a bonus-point try for flanker Josh van der Flier.
