Pressure, pressure and more pressure.
Pressure inside, pressure outside.
It wore the Tigers down. Jadeveon Clowney alone took Tajh Boyd to the ground five times.
The pressure eventually paid off with a pair of hurried throws and interceptions that turned the game decisively in South Carolina's favor.
The first came late in the first half, as the Tigers, leading 14-10, attempted to answer a Gamecock score. Clemson moved into South Carolina territory via a 16-yard strike from Boyd to Jaron Brown and a third-and-one conversion keeper by Boyd.
But on first down from the South Carolina 47, Boyd was pressured from three sides and hit as he released a wobbly pass into the hands of Gamecock safety DeVonte Holloman.
After South Carolina opened the second half with an 85-yard scoring drive for a 17-14 lead, the teams swapped field goals late in the third quarter.
The Tigers had their chance at a momentum swing when Xavier Brewer ended a penalty-aided threat with an end zone interception, and Tigers got an offensive boost from a taunting penalty against D.J. Swearinger after a big hit on Andre Ellington.
But on third and seven from just inside Gamecock territory, the Tigers' protection pocket collapsed and Boyd tried to deliver an over-the-middle strike.
Instead, Brison Williams stepped into the path of the ball to end Clemson's last best chance.
The Gamecocks took care of their fourth quarter business with a 65-yard, 13-play drive that ate up 7:39 and put the finishing touch on a 27-17 victory.