Leaders Leinster secured a record victory in the United Rugby Championship as they thrashed Zebre 76-5 in Dublin.
Third placed Glasgow slipped to a 33-7 defeat against play-off chasing Benetton, while Dragons lost 48-12 to the Stormers.
Cardiff's play-off hopes were dented as they went down 45-21 against the Bulls in South Africa.
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Edinburgh got a bonus point win against Connacht to leave them just two points outside the top eight.
