Going into Sunday night's game against the Houston Texans, the 49ers ranked near the bottom of the NFL in turnover ratio.Through four games, the Niners had just five takeways on defense, with two fumble recoveries and three interceptions, while giving the ball up nine times.Against the Texans, however, the Niners feasted, intercepting Houston quarterback Matt Schaub three times and recovering a fumble, too, in posting a 34-3 victory at Candlestick Park to win their second straight game and improve to 3-2.It was the seventh time the 49ers have given up three or fewer points in a game since Jim Harbaugh became head coach in 2011, the most in the NFL over that period.Tramaine Brock set the tone for the evening, returning an interception by Schaub 18 yards on the Texans' first possession to put San Francisco up 7-0. It marked the fourth straight game Schaub had thrown a pick-six interception. Then in the second quarter with San Francisco up 14-0, Brock picked off Schaub again, returning the ball 13 yards to the Houston 32-yard line and setting up a quick, four-play push that ended with Anthony Dixon's 2-yard TD run that gave the 49ers a 21-0 halftime lead.Tweeted the Sacramento Bee's...