Cardiff Blues top the RaboDirect PRO12 table after two rounds courtesy of two bonus point wins, but have not won their opening three games of a season since 2007/08.
Ulster did the season's double over the Blues last campaign for the first time since 2005/06, whilst the Cardiff based side have won on three of their last four visits to Ravenhill.
Referee: James Jones (WRU, 53rd competition game)
Assistant Referees: John Carvill, David Keane (both IRFU)
Citing Commissioner: Peter Ferguson (IFRU)
TMO:Marshall Kilgore (IRFU)
Live on BBC NI, BBC W
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