England top the group A standings with nine points with one game remaining away to Wales next week and remain on course for a potential competition decider at home against France or Scotland, who meet tomorrow.
It was something of a strange performance from England, who were always in control but barely fired an attacking shot in the second half, seemingly content to display their admittedly impressive defensive organisation and aggression as Ireland banged away in midfield.
Nonetheless, it was their fourth successive win over Ireland and gave Eddie Jones another useful pointer about where his team need to develop.
Teenage winger Louis Rees-Zammit scored a maiden try on his first start as a youthful Wales ended a six-game losing streak with an 18-0 victory over Georgia in Llanelli.
Wales remained third in Group A, five points behind leaders England, who they host next Saturday, and they handed debuts to flanker James Botham, grandson of former England cricketer Ian, scrumhalf Kieran Hardy, centre Johnny Williams and teenage flyhalf Ioan Lloyd.
Georgia showed improvement from their 40-0 drubbing by England last time out, but were surprisingly outmuscled in the scrum and have now scored only seven points in their last three tests.
Photo caption: England winger Jonny May