FAYETTEVILLE, Ark. -- Arkansas enjoyed a comfortable victory for a change, thanks in large part to Bobby Portis.
Portis had 18 points and 13 rebounds as the Razorbacks won for the fourth time in five games with a 75-55 win over South Carolina on Tuesday night.
It's the 17th straight game in double digits in points for Portis, the preseason first-team All-Southeastern Conference selection who has also finished with double digit rebounds in seven of his last eight games.
Michael Qualls added 11 points for the Razorbacks (17-5, 6-3 SEC), who held the Gamecocks to 27.9 percent (17 of 61) shooting and scored 21 points off 20 turnovers. Portis' rebound total matched his career best.
Sindarius Thornwell led South Carolina (11-10, 2-7) with 16 points, while Marcus Stroman added 10. The Gamecocks have lost five of their last six games and seven of nine.
Arkansas' last four games had each been decided by five points or less, including a 57-56 loss at Florida last week that was decided by free throws in the closing seconds.
Led once again by Portis, who was 7 of 13 from the field, the Razorbacks led by double digits for most of the second half against the reeling Gamecocks.
South Carolina was just 5-of-24 shooting on 3-pointers, and it hit only 8 of 33 shots (24.2 percent) in the second half.
Portis has now scored in double figures in 17 straight games for the Razorbacks. His last game in single digits was a six-point effort against North Texas on Nov. 28, also the only time the sophomore has failed to reach at least 10 points this season.
After trailing 6-0, South Carolina went on a 10-0 run -- capped by an inside basket by Laimonas Chatkevicius. The Gamecocks eventually build a 16-10 lead over the Razorbacks, who -- other than Portis hitting his first two shots -- were 1 of 10 from the field to open the game.
Led by Anton Beard, the freshman point guard making his second straight start, Arkansas followed with an 18-3 run to go up 28-19 and take control of the game. Beard scored the first seven points of the run, while Portis had back-to-back baskets to cap it.
South Carolina did close the lead to 33-28 late in the first half after a 3-pointer by Tyrone Johnson, but Arkansas answered with a 7-0 run -- including a pair of jumpers by Alandise Harris -- to go up 40-28 early in the second.
The lead was less than 10 points only once after that for the Razorbacks, who improved to 13-1 this season in Bud Walton Arena.
South Carolina: The Gamecocks played without forward Demetrius Henry and guard Justin McKie for a third straight game. Both sophomores also sat out against LSU and Georgia because of concussions.
Arkansas: Michael Qualls, the fifth-leading scorer in the SEC at 15.9 points per game, came off the bench for the first time this season. The junior entered the game having hit just 10 of 36 shots over his last three games, and his shooting woes continued as he missed his first nine shots and finished with 11 points on 3-of-14 shooting.
South Carolina is at Vanderbilt on Saturday.
Arkansas hosts Mississippi State on Saturday.