Curtis Jerrells had 18 points and Quincy Acy and Kevin Rogers each had 12 for the Bears (15-3, 3-1 Big 12), who led the entire way.
Denis Clemente had 17 points for Kansas State (11-7, 0-4 Big 12), which has lost its first four conference games for the first time since the 1996-97 season. Dominique Sutton scored 12 points and Darren Kent added 11 for the Wildcats.
The nine 3-pointers by Dunn raised his team-leading total to 61 and tied the record set by David Hamilton in 1995. Dunn came within five of his career-high 38 points, which he scored against Texas Tech on March 8, 2008.
The Bears connected on 13 attempts from outside the arc.