The Blues are actually the joint second top try scorers in the PRO12 with 23 whilst their only two victories over Irish provinces in their last 13 such encounters have both been against Connacht.
Connacht continue to head the Guinness PRO12 table and are the tournament's top try scorers with 25.
Their only defeat in any competition this season was by a single point in 65 at Glasgow in round 2.
Connacht have won their last six matches in the competition, a new Connacht record.
Connacht won 36-31 at Galway in round 3 this season, and are going for a first ever league double over the Blues.
The Irishmen have won just twice before at BT Sport Cardiff Arms Park - against Cardiff RFC in 2001 and The Blues themselves in February 2013.
|HEAD TO HEAD - RECENT GUINNESS PRO12 MEETINGS|
|Cardiff Blues scorers||Connacht scorers|
|Fri 22 Feb 13||BT Sport Cardiff Arms Park|
|Harry Robinson(T) Rhys Patchell(4P) Robin Copeland(T)||Danie Poolman(T) Willie Faloon(2T) Miah Nikora(C/3P)|
|Fri 13 Sep 13||BT Sport Cardiff Arms Park|
|Rhys Patchell(D/6P)||Matt Healy(T) Dan Parks(C/P)|
|Sat 3 May 14||Sportsground|
|Lewis Jones(T) Gareth Davies(2C/P) Dan Fish(T) Penalty Try(T)||Matt Healy(T) Robbie Henshaw(T) Miah Nikora(C/P)|
|Fri 3 Oct 14||Sportsground|
|Rhys Patchell(3C/P) Macauley Cook(T) Sam Hobbs(T) Adam Thomas(T)||Robbie Henshaw(T) Kieran Marmion(T) Craig Ronaldson(3C/P) Nathan White(T)|
|Fri 6 Mar 15||BT Sport Cardiff Arms Park|
|Rhys Patchell(C/2P) Joaquin Tuculet(2T)||Jake Heenan(T) Aly Muldowney(T) Craig Ronaldson(2C/P)|
|Sat 3 Oct 15||Sportsground|
|Rhys Patchell(3C/P) Aled Summerhill(T) Gareth Davies(C) Dan Fish(T) Sam Hobbs(T) Josh Turnbull(T)||Tiernan O'Halloran(T) Danie Poolman(T) Nepia Fox-Matamua(T) Jack Carty(4C/P) Kieran Marmion(T) Aly Muldowney(T)|
Referee: Andrew Brace (IRFU, 6th competition game)
Assistant Referees: Neil Hennessy, Simon Rees (both WRU)
Citing Commissioner: Gwyn Bowden (WRU)
TMO: Jonathan Mason (WRU)