Tyler Nichols contributed 13 points and Tyler Faulkenberry 12 on four 3-pointers for the Buffs (22-7), who will meet Montreat in Friday’s 8 p.m. semifinal.
Desean Green added seven assists to the win.
The Rams (17-12) were paced by Niquan Cousins, who registered a double-double of 24 points and 10 rebounds. Jermiah Jenkins hit for 11 points.
With the score tied at 37 early in the second half, the Buffs generated a 14-4 run that Jacob Cawood book-ended with a 3-pointer and two-point bucket.
The Buffs eventually led by 14 points on two occasions.