Charl Schwartzel completed back-to-back wins with a 12-stroke victory on home soil at the Alfred Dunhill Championship.
The South African shot a closing three-under-par 69 to wrap-up victory at Leopard Creek.
It is the 28-year-old's second week of complete dominance after last week's equally impressive 11-shot win at the Thailand Golf Championship.
Schwartzel said: "It's nice to have continued my form from last week. I was saying a month and a half ago that it's been a pretty disappointing year.
"Slowly and surely I started to swing the club a lot better, back to how I did when I won the Masters, and I actually got excited to play again. It started at the SA Open and from there got better and better. It's been a pretty good year now."
Schwartzel's win is the third-biggest winning margin in the European Tour's 40-year history and it is only bettered by Tiger Woods and Ernie Els, who won the 2000 US Open and 2005 Asian Open by 15 and 13 shots respectively.
The South African started the day 10-shots clear and opened with seven pars. His lead was down to seven when he three-putted the 8th, but he spun his approach to three-feet on the 9th and struck further birdies on the 12th, 13th and the par-five 18th.
The 2011 Masters Champion is now a staggering 84-under par over his last five tournaments going back to the start of November, having previously gone nearly 20 months without a win since his triumph at Augusta.
Swede Kristoffer Broberg finished a distant second, while Gregory Bourdy had to share third with Scotland's Scott Jamieson, defending champion Garth Mulroy and England's Andy Sullivan, who came through the Tour qualifying school last month.
Here are the clubs that the winner Schwartzel used:
Driver: Nike VR Pro 8.5
Fairways: Nike VR Pro 15 & 19
Irons: Nike VR Pro Blades (3–9)
Wedges: Nike VR Pro 48, 54 & 60
Putter: Nike Method 001
Ball: Nike One Tour