The Blues have won their last seven matches with Ulster since the Ulstermen were victorious 32-12 at Ravenhill on 14 October 2006.
Cardiff Blues have lost just one of their last five matches in the Magners League: 10-16 at home to Scarlets on 22 October. The Blues have won four of their last five games against Irish opponents.
Ulster have lost their last three games in all competitions, and have not won away from Ravenhill since their trip to Aironi in round two.
Referee: George Clancy (38th League game).
Assistant Referees: David Jones, Sean Brickell (both WRU).
TMO: Tony Rowlands (WRU).
Liveon S4/C.