WORLD RANKINGS: Ireland opens gap on Boks
WORLD RANKINGS: Ireland opens gap on BoksSHARE
Ireland recorded their biggest win (38-3) over South Africa by some distance at the Aviva Stadium in Dublin.
Ireland's 35-point winning margin more than doubled their previous best of 17 over South Africa and was worth one full rating point.
They are now on 86.39 points with the cushion between themselves and the Springboks over two points.
The Wallabies' 13th straight victory over Wales, this time 29-21, came with a reward of just under a fraction of a point, to move them on to 88.02 points.
They remain in third place overall, just over two points behind England whose own position of second is unchanged following a scrappy 21-8 victory over Argentina at Twickenham.
New Zealand stay top of the pile, on 93.83 points, after seeing off France 38-18 in Paris.
The biggest risers and fallers mainly came lower down the rankings although Italy move up one place, above Tonga, into 13th thanks to a 19-10 win over ninth-ranked Fiji.