Devan Downey led the Gamecocks (11-10, 2-5 Southeastern Conference) with 25 points and capped the win with a pair of technical foul free throws with 1.1 seconds left. South Carolina has won two in a row after knocking off Georgia earlier in the week.
That Downey would score the final points was particularly fitting.
Ole Miss coach Andy Kennedy's final game as coach of Cincinnati occurred against South Carolina in the 2006 National Invitation Tournament. Kennedy took the job at Mississippi moments afterward, and Downey -- his prized pupil with the Bearcats -- transferred to South Carolina.
Dwayne Curtis had 25 points and 10 rebounds for the Rebels (16-4, 3-4), becoming the 30th player to score more than 1,000 career points at Mississippi. Chris Warren and Zach Graham had 14 points apiece, and David Huertas finished with 13 for Ole Miss, which lost at home for the first time in 11 games.
Huertas hit a 3-pointer that gave Ole Miss a 77-75 lead with 1:25 left. South Carolina forced a miss by the Rebels with 39 seconds left, setting up Archie's 3-pointer.